Empty Field
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Guid.Empty Field


A read-only instance of the Guid structure whose value is all zeros.

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

public static readonly Guid Empty

Field Value

Type: System.Guid

You can compare a GUID with the value of the Guid.Empty field to determine whether a GUID is non-zero. 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 Main()
      // Create a GUID and determine whether it consists of all zeros.
      Guid guid1 = Guid.NewGuid();
      Console.WriteLine("Empty: {0}\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);
      Console.WriteLine("Empty: {0}", guid2 == Guid.Empty);
// The example displays output like the following:
//       11c43ee8-b9d3-4e51-b73f-bd9dda66e29c
//       Empty: False
//       00000000-0000-0000-0000-000000000000
//       Empty: True

Universal Windows Platform
Available since 4.5
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
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