Guid.Empty Field
.NET Framework (current version)
A read-only instance of the Guid structure whose value is all zeros.
Assembly: mscorlib (in mscorlib.dll)
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(guid1); 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(guid2); 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 8
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
Available since 8
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
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