EventAttributes Enumeration

Specifies the attributes of an event.

This enumeration has a FlagsAttribute attribute that allows a bitwise combination of its member values.

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

public enum EventAttributes

Member nameDescription
Supported by Silverlight for Windows PhoneSupported by Xbox 360NoneSpecifies that the event has no attributes.
Supported by Silverlight for Windows PhoneSupported by Xbox 360SpecialNameSpecifies that the event is special in a way described by the name.
Supported by Silverlight for Windows PhoneSupported by Xbox 360ReservedMaskSpecifies a reserved flag for common language runtime use only.
Supported by Silverlight for Windows PhoneSupported by Xbox 360RTSpecialNameSpecifies that the common language runtime should check name encoding.

EventAttributes values may be combined using the bitwise OR operation to get the appropriate combination.

The following example uses reflection emit to create a type with two events. It uses EventAttributes.None to specify that the events have no attributes.

using System;
using System.Threading;
using System.Reflection;
using System.Reflection.Emit;

public class Example
   public delegate void MyEvent(Object temp);
   public static void Demo(System.Windows.Controls.TextBlock outputBlock)
      TypeBuilder helloWorldClass = CreateCallee(Thread.GetDomain());

      EventInfo[] info =
         helloWorldClass.GetEvents(BindingFlags.Public | BindingFlags.Instance);
      outputBlock.Text += "'HelloWorld' type has following events :" + "\n";
      for (int i = 0; i < info.Length; i++)
         outputBlock.Text += info[i].Name + "\n";

   // Create the callee transient dynamic assembly.
   private static TypeBuilder CreateCallee(AppDomain myDomain)
      AssemblyName assemblyName = new AssemblyName();
      assemblyName.Name = "EmittedAssembly";

      // Create the callee dynamic assembly.
      AssemblyBuilder myAssembly =
         myDomain.DefineDynamicAssembly(assemblyName, AssemblyBuilderAccess.Run);
      // Create a dynamic module named "CalleeModule" in the callee.
      ModuleBuilder myModule = myAssembly.DefineDynamicModule("EmittedModule");

      // Define a public class named "HelloWorld" in the assembly.
      TypeBuilder helloWorldClass =
         myModule.DefineType("HelloWorld", TypeAttributes.Public);

      MethodBuilder myMethod1 = helloWorldClass.DefineMethod("OnClick",
         MethodAttributes.Public, typeof(void), new Type[] { typeof(Object) });
      ILGenerator methodIL1 = myMethod1.GetILGenerator();
      MethodBuilder myMethod2 = helloWorldClass.DefineMethod("OnMouseUp",
         MethodAttributes.Public, typeof(void), new Type[] { typeof(Object) });
      ILGenerator methodIL2 = myMethod2.GetILGenerator();

      // Create the events.
      EventBuilder myEvent1 = helloWorldClass.DefineEvent("Click", EventAttributes.None,
      EventBuilder myEvent2 = helloWorldClass.DefineEvent("MouseUp", EventAttributes.None,

      return (helloWorldClass);


Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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