System.Core 3.5.0.0 System.Attribute System.AttributeUsage(System.AttributeTargets.Assembly | System.AttributeTargets.Class | System.AttributeTargets.Method) In Visual Basic, you should use this attribute to create an extension method. For more information, see Extension Methods (Visual Basic). In C#, you do not need to use this attribute; you should use the this (C# Reference) modifier for the first parameter to create an extension method. The compiler automatically emits ExtensionAttribute for extension methods. For more information, see Extension Methods (C# Programming Guide). If you are writing a compiler that supports extension methods, your compiler should emit this attribute on each extension method and on each class and assembly that contains one or more extension methods.

Indicates that a method is an extension method, or that a class or assembly contains extension methods.

Constructor 3.5.0.0 To be added.

Initializes a new instance of the class.