Xamarin.Forms.Core 2.0.0.0 System.Attribute System.AttributeUsage(System.AttributeTargets.Assembly, AllowMultiple=true) Attribute that identifies a with a unique identifier that can be used with to locate an effect. Developers must supply a name that is unique over the scope of the value that was supplied to . The method takes a string that is the concatenation of the the resolution group name that was provided to , '.', and the name that was supplied to , and returns an effect that will have the type . For example, with the declarations: Then the code below will add the effect to a button: Constructor 2.0.0.0 The type of the marked . A unique name for the . Creates a new . Developers must supply a that is unique over the scope of the value that was supplied to . The method takes a string that is the concatenation of the the resolution group name that was provided to , '.', and the name that was supplied to , and returns an effect that will have the type . For example, with the declarations: Then the code below will add the effect to a button: