Sample: Use LINQ with late binding

 

Applies To: Dynamics CRM 2013

This sample code is for Microsoft Dynamics CRM 2013 and Microsoft Dynamics CRM Online. Download the Microsoft Dynamics CRM SDK package. The sample can be found in the following location in the download package:

SampleCode\CS\GeneralProgramming\Queries\UseLinqWithLateBinding.cs

SampleCode\VB\GeneralProgramming\Queries\UseLinqWithLateBinding.vb

Requirements

For more information about the requirements for running the sample code provided in this SDK, see Use the sample and helper code.

Demonstrates

This sample shows how to create .NET Language-Integrated Query (LINQ) queries using late-bound entities.

Example

using System;
using System.Collections.Generic;
using System.Linq;
using System.ServiceModel;

// These namespaces are found in the Microsoft.Xrm.Sdk.dll assembly
// located in the SDK\bin folder of the SDK download.
using Microsoft.Xrm.Sdk;
using Microsoft.Xrm.Sdk.Client;

namespace Microsoft.Crm.Sdk.Samples
{
 /// <summary>
 /// Demonstrates how to make LINQ queries with the OrganizationServiceContext
 /// object and the dynamic entity type.</summary>
 /// <remarks>
 /// At run-time, you will be given the option to delete all the
 /// database records created by this program.</remarks>
 public class UseLinqWithDotNetDataServicesDE
 {
  #region Class Level Members
  /// <summary>
  /// Stores the organization service proxy.
  /// </summary>
  private OrganizationServiceProxy _serviceProxy;
  // Define the IDs needed for this sample.
  private List<Guid> _accountIds = new List<Guid>();
  private List<Guid> _contactIds = new List<Guid>();
  private List<Guid> _leadIds = new List<Guid>();

  #endregion Class Level Members

  #region How To Sample Code
  /// <summary>
  /// This method first connects to the Organization service and service context.
  /// Afterwards, several LINQ query techniques are demonstrated.
  /// </summary>
  /// <param name="serverConfig">Contains server connection information.</param>
  /// <param name="promptforDelete">When True, the user will be prompted to delete all
  /// created entities.</param>
  public void Run(ServerConnection.Configuration serverConfig, bool promptforDelete)
  {
   try
   {
    // Connect to the Organization service. 
    // The using statement assures that the service proxy will be properly disposed.
    using (_serviceProxy = ServerConnection.GetOrganizationProxy(serverConfig))
    {
     // This statement is required to enable early-bound type support.
     _serviceProxy.EnableProxyTypes();

     CreateRequiredRecords();

     OrganizationServiceContext orgContext =
         new OrganizationServiceContext(_serviceProxy);

     // Retrieve records with Skip/Take record paging. Setting a page size
     // can help you manage your Skip and Take calls, since Skip must be
     // passed a multiple of Take's parameter value.
     int pageSize = 5;

     var accountsByPage = from a in orgContext.CreateQuery("account")
                          select a["name"];
     System.Console.WriteLine("Skip 10 accounts, then Take 5 accounts");
     System.Console.WriteLine("======================================");
     foreach (var name in accountsByPage.Skip(2 * pageSize).Take(pageSize))
     {
      System.Console.WriteLine(name);
     }
     System.Console.WriteLine();
     System.Console.WriteLine("<End of Listing>");
     System.Console.WriteLine();
     //OUTPUT:
     //Skip 10 accounts, then Take 5 accounts
     //======================================
     //Fourth Coffee 6
     //Fourth Coffee 7
     //Fourth Coffee 8
     //Fourth Coffee 9
     //Fourth Coffee 10

     //<End of Listing>

     // Use orderBy to order items retrieved.
     var orderedAccounts = from a in orgContext.CreateQuery("account")
                           orderby a["name"]
                           select a["name"];
     System.Console.WriteLine("Display accounts ordered by name");
     System.Console.WriteLine("================================");
     foreach (var name in orderedAccounts)
     {
      System.Console.WriteLine(name);
     }
     System.Console.WriteLine();
     System.Console.WriteLine("<End of Listing>");
     System.Console.WriteLine();
     //OUTPUT:
     //Display accounts ordered by name
     //================================
     //A. Datum Corporation
     //Adventure Works
     //Coho Vineyard
     //Fabrikam
     //Fourth Coffee 1
     //Fourth Coffee 10
     //Fourth Coffee 2
     //Fourth Coffee 3
     //Fourth Coffee 4
     //Fourth Coffee 5
     //Fourth Coffee 6
     //Fourth Coffee 7
     //Fourth Coffee 8
     //Fourth Coffee 9
     //Humongous Insurance

     //<End of Listing>


     // Filter multiple entities using LINQ.
     var query = from c in orgContext.CreateQuery("contact")
                 join a in orgContext.CreateQuery("account")
                     on c["contactid"] equals a["primarycontactid"]
                 where (String)c["lastname"] == "Wilcox" ||
                     (String)c["lastname"] == "Andrews"
                 where ((String)a["address1_telephone1"]).Contains("(206)")
                     || ((String)a["address1_telephone1"]).Contains("(425)")
                 select new
                 {
                  Contact = new
                  {
                   FirstName = c["firstname"],
                   LastName = c["lastname"]
                  },
                  Account = new
                  {
                   Address1_Telephone1 = a["address1_telephone1"]
                  }
                 };

     Console.WriteLine("Join account and contact");
     Console.WriteLine("List all records matching specified parameters");
     Console.WriteLine("Contact name: Wilcox or Andrews");
     Console.WriteLine("Account area code: 206 or 425");
     Console.WriteLine("==============================================");
     foreach (var record in query)
     {
      Console.WriteLine("Contact Name: {0} {1}",
          record.Contact.FirstName, record.Contact.LastName);
      Console.WriteLine("Account Phone: {0}",
          record.Account.Address1_Telephone1);
     }
     Console.WriteLine("<End of Listing>");
     Console.WriteLine();
     //OUTPUT:
     //Join account and contact
     //List all records matching specified parameters
     //Contact name: Wilcox or Andrews
     //Account area code: 206 or 425
     //==============================================
     //Contact Name: Ben Andrews
     //Account Phone: (206)555-5555
     //Contact Name: Ben Andrews
     //Account Phone: (425)555-5555
     //Contact Name: Colin Wilcox
     //Account Phone: (425)555-5555
     //<End of Listing>

     // Build a complex query with LINQ. This query includes multiple
     // JOINs and a complex WHERE statement.
     var complexQuery = from c in orgContext.CreateQuery("contact")
                        join a in orgContext.CreateQuery("account")
                             on c["contactid"] equals a["primarycontactid"]
                        join l in orgContext.CreateQuery("lead")
                             on a["originatingleadid"] equals l["leadid"]
                        where (String)c["lastname"] == "Wilcox" ||
                             (String)c["lastname"] == "Andrews"
                        where ((String)a["address1_telephone1"]).Contains("(206)")
                            || ((String)a["address1_telephone1"]).Contains("(425)")
                        select new
                        {
                         Contact = new
                         {
                          FirstName = c["firstname"],
                          LastName = c["lastname"]
                         },
                         Account = new
                         {
                          Address1_Telephone1 = a["address1_telephone1"]
                         },
                         Lead = new
                         {
                          LeadId = l["leadid"]
                         }
                        };

     Console.WriteLine("Join account, contact and lead");
     Console.WriteLine("List all records matching specified parameters");
     Console.WriteLine("Contact name: Wilcox or Andrews");
     Console.WriteLine("Account area code: 206 or 425");
     Console.WriteLine("==============================================");
     foreach (var record in complexQuery)
     {
      Console.WriteLine("Lead ID: {0}",
          record.Lead.LeadId);
      Console.WriteLine("Contact Name: {0} {1}",
          record.Contact.FirstName, record.Contact.LastName);
      Console.WriteLine("Account Phone: {0}",
          record.Account.Address1_Telephone1);
     }
     Console.WriteLine("<End of Listing>");
     Console.WriteLine();
     //OUTPUT:
     //Join account, contact and lead
     //List all records matching specified parameters
     //Contact name: Wilcox or Andrews
     //Account area code: 206 or 425
     //==============================================
     //Lead ID: 78d5df14-64a3-e011-aea3-00155dba3818
     //Contact Name: Colin Wilcox
     //Account Phone: (425)555-5555
     //<End of Listing>

     DeleteRequiredRecords(promptforDelete);
    }
   }

   // Catch any service fault exceptions that Microsoft Dynamics CRM throws.
   catch (FaultException<Microsoft.Xrm.Sdk.OrganizationServiceFault>)
   {
    // You can handle an exception here or pass it back to the calling method.
    throw;
   }
  }

  /// <summary>
  /// Creates any entity records that this sample requires.
  /// </summary>
  public void CreateRequiredRecords()
  {
   // Create 3 contacts.
   Contact contact = new Contact()
   {
    FirstName = "Ben",
    LastName = "Andrews",
    EMailAddress1 = "sample@example.com",
    Address1_City = "Redmond",
    Address1_StateOrProvince = "WA"
   };
   _contactIds.Add(_serviceProxy.Create(contact));

   contact = new Contact()
   {
    FirstName = "Colin",
    LastName = "Wilcox",
    EMailAddress1 = "sample@example.com",
    Address1_City = "Bellevue",
    Address1_StateOrProvince = "WA"
   };
   _contactIds.Add(_serviceProxy.Create(contact));

   contact = new Contact()
   {
    FirstName = "Ben",
    LastName = "Smith",
    EMailAddress1 = "sample@example.com",
    Address1_City = "Bellevue",
    Address1_StateOrProvince = "WA"
   };
   _contactIds.Add(_serviceProxy.Create(contact));

   // Create 3 leads.
   Lead lead = new Lead()
   {
    FirstName = "Dan",
    LastName = "Wilson",
    EMailAddress1 = "sample@example.com",
    Address1_City = "Redmond",
    Address1_StateOrProvince = "WA"
   };
   _leadIds.Add(_serviceProxy.Create(lead));

   lead = new Lead()
   {
    FirstName = "Jim",
    LastName = "Wilson",
    EMailAddress1 = "sample@example.com",
    Address1_City = "Bellevue",
    Address1_StateOrProvince = "WA"
   };
   _leadIds.Add(_serviceProxy.Create(lead));

   lead = new Lead()
   {
    FirstName = "Denise",
    LastName = "Smith",
    EMailAddress1 = "sample@example.com",
    Address1_City = "Bellevue",
    Address1_StateOrProvince = "WA"
   };
   _leadIds.Add(_serviceProxy.Create(lead));

   // Create 5 customized Accounts for the LINQ samples.
   Account account = new Account
   {
    Name = "A. Datum Corporation",
    Address1_StateOrProvince = "Colorado",
    Address1_Telephone1 = "(206)555-5555",
    PrimaryContactId =
        new EntityReference(Contact.EntityLogicalName, _contactIds[0])
   };
   _accountIds.Add(_serviceProxy.Create(account));

   account = new Account
   {
    Name = "Adventure Works",
    Address1_StateOrProvince = "Illinois",
    Address1_County = "Lake County",
    Address1_Telephone1 = "(206)555-5555",
    OriginatingLeadId =
        new EntityReference(Lead.EntityLogicalName, _leadIds[0])
   };
   _accountIds.Add(_serviceProxy.Create(account));

   account = new Account
   {
    Name = "Coho Vineyard",
    Address1_StateOrProvince = "Washington",
    Address1_County = "King County",
    Address1_Telephone1 = "(425)555-5555",
    PrimaryContactId =
        new EntityReference(Contact.EntityLogicalName, _contactIds[1]),
    OriginatingLeadId =
        new EntityReference(Lead.EntityLogicalName, _leadIds[0])
   };
   _accountIds.Add(_serviceProxy.Create(account));

   account = new Account
   {
    Name = "Fabrikam",
    Address1_StateOrProvince = "Washington",
    Address1_Telephone1 = "(425)555-5555",
    PrimaryContactId =
        new EntityReference(Contact.EntityLogicalName, _contactIds[0])
   };
   _accountIds.Add(_serviceProxy.Create(account));

   account = new Account
   {
    Name = "Humongous Insurance",
    Address1_StateOrProvince = "Missouri",
    Address1_County = "Saint Louis County",
    Address1_Telephone1 = "(314)555-5555",
    PrimaryContactId =
        new EntityReference(Contact.EntityLogicalName, _contactIds[1])
   };
   _accountIds.Add(_serviceProxy.Create(account));

   // Create 10 basic Account records.
   for (int i = 1; i <= 10; i++)
   {
    account = new Account
    {
     Name = "Fourth Coffee " + i,
     Address1_StateOrProvince = "California"
    };
    _accountIds.Add(_serviceProxy.Create(account));
   }
  }

  /// <summary>
  /// Deletes any entity records that were created for this sample.
  /// <param name="prompt">Indicates whether to prompt the user 
  /// to delete the records created in this sample.</param>
  /// </summary>
  public void DeleteRequiredRecords(bool prompt)
  {
   bool toBeDeleted = true;

   if (prompt)
   {
    // Ask the user if the created entities should be deleted.
    Console.Write("\nDo you want these entity records deleted? (y/n) [y]: ");
    String answer = Console.ReadLine();
    if (answer.StartsWith("y") ||
        answer.StartsWith("Y") ||
        answer == String.Empty)
    {
     toBeDeleted = true;
    }
    else
    {
     toBeDeleted = false;
    }
   }

   if (toBeDeleted)
   {
    // Delete all records created in this sample.
    foreach (Guid accountId in _accountIds)
    {
     _serviceProxy.Delete(Account.EntityLogicalName, accountId);
    }
    foreach (Guid contactId in _contactIds)
    {
     _serviceProxy.Delete(Contact.EntityLogicalName, contactId);
    }
    foreach (Guid leadId in _leadIds)
    {
     _serviceProxy.Delete(Lead.EntityLogicalName, leadId);
    }
    Console.WriteLine("Entity record(s) have been deleted.");
   }
  }

  #endregion How To Sample Code

  #region Main method

  /// <summary>
  /// Standard Main() method used by most SDK samples.
  /// </summary>
  /// <param name="args"></param>
  static public void Main(string[] args)
  {
   try
   {
    // Obtain the target organization's Web address and client logon 
    // credentials from the user.
    ServerConnection serverConnect = new ServerConnection();
    ServerConnection.Configuration config = serverConnect.GetServerConfiguration();

    UseLinqWithDotNetDataServicesDE app = new UseLinqWithDotNetDataServicesDE();
    app.Run(config, true);
   }
   catch (FaultException<Microsoft.Xrm.Sdk.OrganizationServiceFault> ex)
   {
    Console.WriteLine("The application terminated with an error.");
    Console.WriteLine("Timestamp: {0}", ex.Detail.Timestamp);
    Console.WriteLine("Code: {0}", ex.Detail.ErrorCode);
    Console.WriteLine("Message: {0}", ex.Detail.Message);
    Console.WriteLine("Plugin Trace: {0}", ex.Detail.TraceText);
    Console.WriteLine("Inner Fault: {0}",
        null == ex.Detail.InnerFault ? "No Inner Fault" : "Has Inner Fault");
   }
   catch (System.TimeoutException ex)
   {
    Console.WriteLine("The application terminated with an error.");
    Console.WriteLine("Message: {0}", ex.Message);
    Console.WriteLine("Stack Trace: {0}", ex.StackTrace);
    Console.WriteLine("Inner Fault: {0}",
        null == ex.InnerException.Message ? "No Inner Fault" : ex.InnerException.Message);
   }
   catch (System.Exception ex)
   {
    Console.WriteLine("The application terminated with an error.");
    Console.WriteLine(ex.Message);

    // Display the details of the inner exception.
    if (ex.InnerException != null)
    {
     Console.WriteLine(ex.InnerException.Message);

     FaultException<Microsoft.Xrm.Sdk.OrganizationServiceFault> fe = ex.InnerException
         as FaultException<Microsoft.Xrm.Sdk.OrganizationServiceFault>;
     if (fe != null)
     {
      Console.WriteLine("Timestamp: {0}", fe.Detail.Timestamp);
      Console.WriteLine("Code: {0}", fe.Detail.ErrorCode);
      Console.WriteLine("Message: {0}", fe.Detail.Message);
      Console.WriteLine("Plugin Trace: {0}", fe.Detail.TraceText);
      Console.WriteLine("Inner Fault: {0}",
          null == fe.Detail.InnerFault ? "No Inner Fault" : "Has Inner Fault");
     }
    }
   }
   // Additonal exceptions to catch: SecurityTokenValidationException, ExpiredSecurityTokenException,
   // SecurityAccessDeniedException, MessageSecurityException, and SecurityNegotiationException.

   finally
   {
    Console.WriteLine("Press <Enter> to exit.");
    Console.ReadLine();
   }
  }
  #endregion Main method
 }
}

Imports System.ServiceModel

' These namespaces are found in the Microsoft.Xrm.Sdk.dll assembly
' located in the SDK\bin folder of the SDK download.
Imports Microsoft.Xrm.Sdk
Imports Microsoft.Xrm.Sdk.Client

Namespace Microsoft.Crm.Sdk.Samples
 ''' <summary>
 ''' Demonstrates how to make LINQ queries with the OrganizationServiceContext
 ''' object and the dynamic entity type.</summary>
 ''' <remarks>
 ''' At run-time, you will be given the option to delete all the
 ''' database records created by this program.</remarks>
 Public Class UseLinqWithDotNetDataServicesDE
#Region "Class Level Members"
  ''' <summary>
  ''' Stores the organization service proxy.
  ''' </summary>
  Private _serviceProxy As OrganizationServiceProxy
  ' Define the IDs needed for this sample.
  Private _accountIds As New List(Of Guid)()
  Private _contactIds As New List(Of Guid)()
  Private _leadIds As New List(Of Guid)()

#End Region ' Class Level Members

#Region "How To Sample Code"
  ''' <summary>
  ''' This method first connects to the Organization service and service context.
  ''' Afterwards, several LINQ query techniques are demonstrated.
  ''' </summary>
  ''' <param name="serverConfig">Contains server connection information.</param>
  ''' <param name="promptforDelete">When True, the user will be prompted to delete all
  ''' created entities.</param>
  Public Sub Run(ByVal serverConfig As ServerConnection.Configuration,
                 ByVal promptforDelete As Boolean)
   Try
    ' Connect to the Organization service. 
    ' The using statement assures that the service proxy will be properly disposed.
    _serviceProxy = ServerConnection.GetOrganizationProxy(serverConfig)
    Using _serviceProxy
     ' This statement is required to enable early-bound type support.
     _serviceProxy.EnableProxyTypes()

     CreateRequiredRecords()

     Dim orgContext As New OrganizationServiceContext(_serviceProxy)

     ' Retrieve records with Skip/Take record paging. Setting a page size
     ' can help you manage your Skip and Take calls, since Skip must be
     ' passed a multiple of Take's parameter value.
     Dim pageSize As Integer = 5

     Dim accountsByPage = From a In orgContext.CreateQuery("account") _
                          Select a("name")
     Console.WriteLine("Skip 10 accounts, then Take 5 accounts")
     Console.WriteLine("======================================")
     For Each name In accountsByPage.Skip(2 * pageSize).Take(pageSize)
      Console.WriteLine(name)
     Next name
     Console.WriteLine()
     Console.WriteLine("<End of Listing>")
     Console.WriteLine()
     ' OUTPUT:
     ' Skip 10 accounts, then Take 5 accounts
     ' ======================================
     ' Fourth Coffee 6
     ' Fourth Coffee 7
     ' Fourth Coffee 8
     ' Fourth Coffee 9
     ' Fourth Coffee 10

     ' <End of Listing>

     ' Use orderBy to order items retrieved.
     Dim orderedAccounts = From a In orgContext.CreateQuery("account") _
                           Order By a("name") _
                           Select a("name")
     Console.WriteLine("Display accounts ordered by name")
     Console.WriteLine("================================")
     For Each name In orderedAccounts
      Console.WriteLine(name)
     Next name
     Console.WriteLine()
     Console.WriteLine("<End of Listing>")
     Console.WriteLine()
     ' OUTPUT:
     ' Display accounts ordered by name
     ' ================================
     ' A. Datum Corporation
     ' Adventure Works
     ' Coho Vineyard
     ' Fabrikam
     ' Fourth Coffee 1
     ' Fourth Coffee 10
     ' Fourth Coffee 2
     ' Fourth Coffee 3
     ' Fourth Coffee 4
     ' Fourth Coffee 5
     ' Fourth Coffee 6
     ' Fourth Coffee 7
     ' Fourth Coffee 8
     ' Fourth Coffee 9
     ' Humongous Insurance

     ' <End of Listing>

     ' Filter multiple entities using LINQ.
     Dim query = From c In orgContext.CreateQuery("contact") _
                 Join a In orgContext.CreateQuery("account") _
                 On c("contactid") Equals a("primarycontactid") _
                 Where CType(c("lastname"), String).Equals("Wilcox") _
                 OrElse CType(c("lastname"), String).Equals("Andrews") _
                 Where (CType(a("address1_telephone1"), String)) _
                 .Contains("(206)") OrElse _
                 (CType(a("address1_telephone1"),
                  String)).Contains("(425)") _
                 Select New With
                        {
                            Key .Contact = New With
                                           {Key .FirstName = c("firstname"),
                                            Key .LastName = c("lastname")},
                             Key .Account = New With
                                            {Key .Address1_Telephone1 _
                                            = a("address1_telephone1")}}

     Console.WriteLine("Join account and contact")
     Console.WriteLine("List all records matching specified parameters")
     Console.WriteLine("Contact name: Wilcox or Andrews")
     Console.WriteLine("Account area code: 206 or 425")
     Console.WriteLine("==============================================")
     For Each record In query
      Console.WriteLine("Contact Name: {0} {1}", record.Contact.FirstName, record.Contact.LastName)
      Console.WriteLine("Account Phone: {0}", record.Account.Address1_Telephone1)
     Next record
     Console.WriteLine("<End of Listing>")
     Console.WriteLine()
     ' OUTPUT:
     ' Join account and contact
     ' List all records matching specified parameters
     ' Contact name: Wilcox or Andrews
     ' Account area code: 206 or 425
     ' ==============================================
     ' Contact Name: Ben Andrews
     ' Account Phone: (206)555-5555
     ' Contact Name: Ben Andrews
     ' Account Phone: (425)555-5555
     ' Contact Name: Colin Wilcox
     ' Account Phone: (425)555-5555
     ' <End of Listing>

     ' Build a complex query with LINQ. This query includes multiple
     ' JOINs.
     'Note: Where statements are not working with the below multiple join query.
     '       Refer equivalent C# snippet for full complex query.
     'TODO: Fix issue to include where statements as showin in C# sample.
     Dim complexQuery = From c In orgContext.CreateQuery("contact") _
                        Join a In orgContext.CreateQuery("account") _
                        On c("contactid") Equals a("primarycontactid") _
                        Join l In orgContext.CreateQuery("lead") _
                        On a("originatingleadid") Equals l("leadid") _
                        Select New With
                               {Key .Contact = New With
                                               {Key .FirstName = c("firstname"),
                                                Key .LastName = c("lastname")},
                                Key .Account = New With
                                               {Key .Address1_Telephone1 _
                                               = a("address1_telephone1")},
                                Key .Lead = New With
                                            {Key .LeadId = l("leadid")}}

     Console.WriteLine("Join account, contact and lead")
     Console.WriteLine("List all records matching specified parameters")
     Console.WriteLine("==============================================")
     For Each record In complexQuery
      Console.WriteLine("Lead ID: {0}", record.Lead.LeadId)
      Console.WriteLine("Contact Name: {0} {1}",
                        record.Contact.FirstName,
                        record.Contact.LastName)
      Console.WriteLine("Account Phone: {0}",
                        record.Account.Address1_Telephone1)
     Next record
     Console.WriteLine("<End of Listing>")
     Console.WriteLine()
     ' OUTPUT:
     ' Join account, contact and lead
     ' List all records matching specified parameters
     ' Contact name: Wilcox or Andrews
     ' Account area code: 206 or 425
     ' ==============================================
     ' Lead ID: 78d5df14-64a3-e011-aea3-00155dba3818
     ' Contact Name: Colin Wilcox
     ' Account Phone: (425)555-5555
     ' <End of Listing>

     DeleteRequiredRecords(promptforDelete)
    End Using

    ' Catch any service fault exceptions that Microsoft Dynamics CRM throws.
   Catch fe As FaultException(Of Microsoft.Xrm.Sdk.OrganizationServiceFault)
    ' You can handle an exception here or pass it back to the calling method.
    Throw
   End Try
  End Sub

  ''' <summary>
  ''' Creates any entity records that this sample requires.
  ''' </summary>
  Public Sub CreateRequiredRecords()
   ' Create 3 contacts.
   Dim contact As New Contact() With
       {
           .FirstName = "Ben",
           .LastName = "Andrews",
           .EMailAddress1 = "sample@example.com",
           .Address1_City = "Redmond",
           .Address1_StateOrProvince = "WA"
       }
   _contactIds.Add(_serviceProxy.Create(contact))

   contact = New Contact() With
             {
                 .FirstName = "Colin",
                 .LastName = "Wilcox",
                 .EMailAddress1 = "sample@example.com",
                 .Address1_City = "Bellevue",
                 .Address1_StateOrProvince = "WA"
             }
   _contactIds.Add(_serviceProxy.Create(contact))

   contact = New Contact() With
             {
                 .FirstName = "Ben",
                 .LastName = "Smith",
                 .EMailAddress1 = "sample@example.com",
                 .Address1_City = "Bellevue",
                 .Address1_StateOrProvince = "WA"
             }
   _contactIds.Add(_serviceProxy.Create(contact))

   ' Create 3 leads.
   Dim lead As New Lead() With
       {
           .FirstName = "Dan",
           .LastName = "Wilson",
           .EMailAddress1 = "sample@example.com",
           .Address1_City = "Redmond",
           .Address1_StateOrProvince = "WA"
       }
   _leadIds.Add(_serviceProxy.Create(lead))

   lead = New Lead() With
          {
              .FirstName = "Jim",
              .LastName = "Wilson",
              .EMailAddress1 = "sample@example.com",
              .Address1_City = "Bellevue",
              .Address1_StateOrProvince = "WA"
          }
   _leadIds.Add(_serviceProxy.Create(lead))

   lead = New Lead() With
          {
              .FirstName = "Denise",
              .LastName = "Smith",
              .EMailAddress1 = "sample@example.com",
              .Address1_City = "Bellevue",
              .Address1_StateOrProvince = "WA"
          }
   _leadIds.Add(_serviceProxy.Create(lead))

   ' Create 5 customized Accounts for the LINQ samples.
   Dim account As Account =
       New Account With
       {
           .Name = "A. Datum Corporation",
           .Address1_StateOrProvince = "Colorado",
           .Address1_Telephone1 = "(206)555-5555",
           .PrimaryContactId = New EntityReference(contact.EntityLogicalName,
                                                   _contactIds(0))
       }
   _accountIds.Add(_serviceProxy.Create(account))

   account = New Account With
             {
                 .Name = "Adventure Works",
                 .Address1_StateOrProvince = "Illinois",
                 .Address1_County = "Lake County",
                 .Address1_Telephone1 = "(206)555-5555",
                 .OriginatingLeadId = New EntityReference(lead.EntityLogicalName,
                                                          _leadIds(0))
             }
   _accountIds.Add(_serviceProxy.Create(account))

   account = New Account With
             {
                 .Name = "Coho Vineyard",
                 .Address1_StateOrProvince = "Washington",
                 .Address1_County = "King County",
                 .Address1_Telephone1 = "(425)555-5555",
                 .PrimaryContactId =
                 New EntityReference(contact.EntityLogicalName,
                                     _contactIds(1)),
                 .OriginatingLeadId =
                 New EntityReference(lead.EntityLogicalName,
                                     _leadIds(0))
             }
   _accountIds.Add(_serviceProxy.Create(account))

   account = New Account With
             {
                 .Name = "Fabrikam",
                 .Address1_StateOrProvince = "Washington",
                 .Address1_Telephone1 = "(425)555-5555",
                 .PrimaryContactId =
                 New EntityReference(contact.EntityLogicalName,
                                     _contactIds(0))
             }
   _accountIds.Add(_serviceProxy.Create(account))

   account =
       New Account With
       {
           .Name = "Humongous Insurance",
           .Address1_StateOrProvince = "Missouri",
           .Address1_County = "Saint Louis County",
           .Address1_Telephone1 = "(314)555-5555",
           .PrimaryContactId =
           New EntityReference(contact.EntityLogicalName,
                               _contactIds(1))
       }
   _accountIds.Add(_serviceProxy.Create(account))

   ' Create 10 basic Account records.
   For i As Integer = 1 To 10
    account = New Account With
              {
                  .Name = "Fourth Coffee " &amp; i,
                  .Address1_StateOrProvince = "California"
              }
    _accountIds.Add(_serviceProxy.Create(account))
   Next i
  End Sub

  ''' <summary>
  ''' Deletes any entity records that were created for this sample.
  ''' <param name="prompt">Indicates whether to prompt the user 
  ''' to delete the records created in this sample.</param>
  ''' </summary>
  Public Sub DeleteRequiredRecords(ByVal prompt As Boolean)
   Dim toBeDeleted As Boolean = True

   If prompt Then
    ' Ask the user if the created entities should be deleted.
    Console.Write(vbLf &amp; "Do you want these entity records deleted? (y/n) [y]: ")
    Dim answer As String = Console.ReadLine()
    If answer.StartsWith("y") OrElse answer.StartsWith("Y") _
        OrElse answer = String.Empty Then
     toBeDeleted = True
    Else
     toBeDeleted = False
    End If
   End If

   If toBeDeleted Then
    ' Delete all records created in this sample.
    For Each accountId As Guid In _accountIds
     _serviceProxy.Delete(Account.EntityLogicalName, accountId)
    Next accountId
    For Each contactId As Guid In _contactIds
     _serviceProxy.Delete(Contact.EntityLogicalName, contactId)
    Next contactId
    For Each leadId As Guid In _leadIds
     _serviceProxy.Delete(Lead.EntityLogicalName, leadId)
    Next leadId
    Console.WriteLine("Entity record(s) have been deleted.")
   End If
  End Sub

#End Region ' How To Sample Code

#Region "Main method"

  ''' <summary>
  ''' Standard Main() method used by most SDK samples.
  ''' </summary>
  ''' <param name="args"></param>
  Public Shared Sub Main(ByVal args() As String)
   Try
    ' Obtain the target organization's Web address and client logon 
    ' credentials from the user.
    Dim serverConnect As New ServerConnection()
    Dim config As ServerConnection.Configuration =
        serverConnect.GetServerConfiguration()

    Dim app As New UseLinqWithDotNetDataServicesDE()
    app.Run(config, True)
   Catch ex As FaultException(Of Microsoft.Xrm.Sdk.OrganizationServiceFault)
    Console.WriteLine("The application terminated with an error.")
    Console.WriteLine("Timestamp: {0}", ex.Detail.Timestamp)
    Console.WriteLine("Code: {0}", ex.Detail.ErrorCode)
    Console.WriteLine("Message: {0}", ex.Detail.Message)
    Console.WriteLine("Plugin Trace: {0}", ex.Detail.TraceText)
                Console.WriteLine("Inner Fault: {0}", If(Nothing Is ex.Detail.InnerFault, "No Inner Fault", "Has Inner Fault"))
   Catch ex As TimeoutException
    Console.WriteLine("The application terminated with an error.")
    Console.WriteLine("Message: {0}", ex.Message)
    Console.WriteLine("Stack Trace: {0}", ex.StackTrace)
                Console.WriteLine("Inner Fault: {0}",
                                  If(Nothing Is ex.InnerException.Message, "No Inner Fault", ex.InnerException.Message))
   Catch ex As Exception
    Console.WriteLine("The application terminated with an error.")
    Console.WriteLine(ex.Message)

    ' Display the details of the inner exception.
    If ex.InnerException IsNot Nothing Then
     Console.WriteLine(ex.InnerException.Message)

     Dim fe As FaultException(Of Microsoft.Xrm.Sdk.OrganizationServiceFault) =
         TryCast(ex.InnerException, 
             FaultException(Of Microsoft.Xrm.Sdk.OrganizationServiceFault))
     If fe IsNot Nothing Then
      Console.WriteLine("Timestamp: {0}", fe.Detail.Timestamp)
      Console.WriteLine("Code: {0}", fe.Detail.ErrorCode)
      Console.WriteLine("Message: {0}", fe.Detail.Message)
      Console.WriteLine("Plugin Trace: {0}", fe.Detail.TraceText)
                        Console.WriteLine("Inner Fault: {0}",
                                          If(Nothing Is fe.Detail.InnerFault, "No Inner Fault", "Has Inner Fault"))
     End If
    End If
    ' Additonal exceptions to catch: SecurityTokenValidationException, ExpiredSecurityTokenException,
    ' SecurityAccessDeniedException, MessageSecurityException, and SecurityNegotiationException.

   Finally
    Console.WriteLine("Press <Enter> to exit.")
    Console.ReadLine()
   End Try
  End Sub
#End Region ' Main method
 End Class
End Namespace

See Also

OrganizationServiceContext
CreateQuery<TEntity>
CreateQuery
Build queries with LINQ (.NET language-integrated query)