Статья
11/17/2011

Type.Equals Method (Object)

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Determines if the underlying system type of the current Type is the same as the underlying system type of the specified Object.

Namespace: System
Assembly: mscorlib (in mscorlib.dll)

Syntax

'Declaration
Public Overrides Function Equals ( _
    o As Object _
) As Boolean

public override bool Equals(
    Object o
)

Parameters

o
Type: System.Object
The Object whose underlying system type is to be compared with the underlying system type of the current Type.

Return Value

Type: System.Boolean
true if the underlying system type of o is the same as the underlying system type of the current Type; otherwise, false. This method also returns false if the object specified by the o parameter is not a Type.

Remarks

This method overrides Object.Equals.

Examples

The following example uses Equals to compare two Object instances.

Note:
To run this example, see Building Examples That Use a Demo Method and a TextBlock Control.

Imports System.Reflection

Class Example

   Public Shared Sub Demo(ByVal outputBlock As System.Windows.Controls.TextBlock)

      Dim a As Type = GetType(System.Object)
      Dim b As Type = GetType(System.Object)
      outputBlock.Text += String.Format("{0} = {1}: {2}", a, b, a.Equals(b)) & vbCrLf
      ' The Type objects in a and b are equal,
      ' because they represent System.Object.

      a = GetType(Example)
      b = New Example().GetType()
      outputBlock.Text += String.Format("{0} is equal to {1}: {2}", a, b, a.Equals(b)) & vbCrLf
      ' The Type objects in a and b are equal,
      ' because they both represent type Example.

      b = GetType([Object])
      outputBlock.Text += String.Format("typeof({0}).Equals(typeof({1})): {2}", a, b, a.Equals(b)) & vbCrLf

      ' The Type objects in a and b are not equal,
      ' because variable a represents type Example
      ' and variable b represents type Object.

      'Console.ReadLine();

   End Sub
End Class
'
' This code example produces the following output:
'    System.Object = System.Object: True
'    Example is equal to Example: True
'    typeof(Example).Equals(typeof(System.Type)): False
'


using System;
using System.Reflection;

class Example
{
   public static void Demo(System.Windows.Controls.TextBlock outputBlock)
   {

      Type a = typeof(System.Object);
      Type b = typeof(System.Object);

      outputBlock.Text += String.Format("{0} == {1}: {2}", a, b, a.Equals(b)) + "\n";

      // The Type objects in a and b are equal,
      // because they represent System.Object.

      a = typeof(Example);
      b = new Example().GetType();

      outputBlock.Text += String.Format("{0} is equal to {1}: {2}", a, b, a.Equals(b)) + "\n";

      // The Type objects in a and b are equal,
      // because they both represent type Example.

      b = typeof(Object);

      outputBlock.Text += String.Format("typeof({0}).Equals(typeof({1})): {2}", a, b, a.Equals(b)) + "\n";

      // The Type objects in a and b are not equal,
      // because variable a represents type Example
      // and variable b represents type Object.

      //Console.ReadLine();

   }
}

//
/* This code example produces the following output:
    System.Object == System.Object: True
    Example is equal to Example: True
    typeof(Example).Equals(typeof(System.Type)): False
*/

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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