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Guid.Equality Operator

Indicates whether the values of two specified Guid objects are equal.

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

public static bool operator ==(
	Guid a,
	Guid b
)

Parameters

a
Type: System.Guid
The first object to compare.
b
Type: System.Guid
The second object to compare.

Return Value

Type: System.Boolean
true if a and b are equal; otherwise, false.

The following example uses the Equality operator to compare two GUID values with Guid.Empty to determine whether they consist exclusively of zeros.


using System;

public class Example
{
   public static void Demo(System.Windows.Controls.TextBlock outputBlock)
   {
      // Create a GUID and determine whether it consists of all zeros.
      Guid guid1 = Guid.NewGuid();
      outputBlock.Text += guid1.ToString() + "\n";
      outputBlock.Text += String.Format("Empty: {0}\n\n", guid1 == Guid.Empty);

      // Create a GUID with all zeros and compare it to Empty.
      Byte[] bytes = new Byte[16];
      Guid guid2 = new Guid(bytes);
      outputBlock.Text += guid2.ToString() + "\n";
      outputBlock.Text += String.Format("Empty: {0}\n", guid2 == Guid.Empty);
   }
}
// The example displays output like the following:
//       11c43ee8-b9d3-4e51-b73f-bd9dda66e29c
//       Empty: False
//       
//       00000000-0000-0000-0000-000000000000
//       Empty: True


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

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

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