Assert.IsInstanceOfType Method (Object, Type, String, array<Object )

Verifies that the specified object is an instance of the specified type. The assertion fails if the type is not found in the inheritance hierarchy of the object. Displays a message if the assertion fails, and applies the specified formatting to it.

Namespace:  Microsoft.VisualStudio.TestTools.UnitTesting
Assembly:  Microsoft.VisualStudio.QualityTools.UnitTestFramework (in Microsoft.VisualStudio.QualityTools.UnitTestFramework.dll)

Syntax

'Declaration
Public Shared Sub IsInstanceOfType ( _
    value As Object, _
    expectedType As Type, _
    message As String, _
    ParamArray parameters As Object() _
)

public static void IsInstanceOfType(
    Object value,
    Type expectedType,
    string message,
    params Object[] parameters
)

public:
static void IsInstanceOfType(
    Object^ value, 
    Type^ expectedType, 
    String^ message, 
    ... array<Object^>^ parameters
)

static member IsInstanceOfType : 
        value:Object * 
        expectedType:Type * 
        message:string * 
        parameters:Object[] -> unit

public static function IsInstanceOfType(
    value : Object, 
    expectedType : Type, 
    message : String, 
    ... parameters : Object[]
)

Parameters

• value
  Type: Object

  The object to verify is of expectedType.

• expectedType
  Type: Type

  The type expected to be found in the inheritance hierarchy of value.

• message
  Type: String

  A message to display if the assertion fails. This message can be seen in the unit test results.

• parameters
  Type: array<Object[]

  An array of parameters to use when formatting message.

Exceptions

Exception	Condition
AssertFailedException	value is nulla null reference (Nothing in Visual Basic) or expectedType is not found in the inheritance hierarchy of value.

.NET Framework Security

• Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see Using Libraries from Partially Trusted Code.

See Also

Reference

Assert Class

IsInstanceOfType Overload

Microsoft.VisualStudio.TestTools.UnitTesting Namespace

Other Resources

Using the Assert Classes