Type.GUID Property

Reference

Definition

Namespace:: System

Assemblies:: netstandard.dll, System.Runtime.dll

Assembly:: System.Runtime.dll

Assembly:: mscorlib.dll

Assembly:: netstandard.dll

Source:: Type.CoreCLR.cs

Source:: Type.CoreCLR.cs

Source:: Type.CoreCLR.cs

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Gets the GUID associated with the Type.

public:
 abstract property Guid GUID { Guid get(); };

public abstract Guid GUID { get; }

member this.GUID : Guid

Public MustOverride ReadOnly Property GUID As Guid

Property Value

Guid

The GUID associated with the Type.

Implements

GUID

Examples

The following example creates the class MyClass1 with a public method, creates a Type object corresponding to MyClass1, and gets the Guid structure using the GUID property of the Type class.

using namespace System;
ref class MyGetTypeFromCLSID
{
public:
   ref class MyClass1
   {
   public:
      void MyMethod1(){}
   };
};

int main()
{
   
   // Get the type corresponding to the class MyClass.
   Type^ myType = MyGetTypeFromCLSID::MyClass1::typeid;
   
   // Get the Object* of the Guid.
   Guid myGuid = (Guid)myType->GUID;
   Console::WriteLine( "The name of the class is {0}", myType );
   Console::WriteLine( "The ClassId of MyClass is {0}", myType->GUID );
}

using System;

class MyGetTypeFromCLSID
{
    public class MyClass1
    {
        public void MyMethod1()
        {
        }
    }
    public static void Main()
    {
        // Get the type corresponding to the class MyClass.
        Type myType = typeof(MyClass1);
        // Get the object of the Guid.
        Guid myGuid =(Guid) myType.GUID;
        Console.WriteLine("The name of the class is "+myType.ToString());
        Console.WriteLine("The ClassId of MyClass is "+myType.GUID);				
    }
}

type MyClass1() =
    member _.MyMethod1() = ()

// Get the type corresponding to the class MyClass.
let myType = typeof<MyClass1>
// Get the object of the Guid.
let myGuid = myType.GUID
printfn $"The name of the class is {myType}"
printfn $"The ClassId of MyClass is {myType.GUID}"

Class MyGetTypeFromCLSID

    Public Class MyClass1

        Public Sub MyMethod1()
        End Sub

    End Class

    Public Shared Sub Main()
        ' Get the type corresponding to the class MyClass.
        Dim myType As Type = GetType(MyClass1)
        ' Get the object of the Guid.
        Dim myGuid As Guid = myType.GUID
        Console.WriteLine(("The name of the class is " + myType.ToString()))
        Console.WriteLine(("The ClassId of MyClass is " + myType.GUID.ToString()))
    End Sub
End Class

Remarks

This property returns a GUID that's associated with a type using the GuidAttribute attribute. If the attribute is omitted, a GUID is assigned automatically.

The GUID returned by this property is typically used to expose a type to COM. It is not meant to be used as a unique identifier of the type.

Applies to

Produkt	Versioner
.NET	Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	2.0, 2.1

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