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EventAttributes Enumeration
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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
Assemblies:   mscorlib (in mscorlib.dll)
  System.Reflection.Primitives (in System.Reflection.Primitives.dll)

[SerializableAttribute]
[FlagsAttribute]
[ComVisibleAttribute(true)]
public enum EventAttributes

Member nameDescription
Supported by the XNA FrameworkSupported by Portable Class LibraryNoneSpecifies that the event has no attributes.
Supported by the XNA FrameworkReservedMaskSpecifies a reserved flag for common language runtime use only.
Supported by the XNA FrameworkSupported by Portable Class LibraryRTSpecialNameSpecifies that the common language runtime should check name encoding.
Supported by the XNA FrameworkSupported by Portable Class LibrarySpecialNameSpecifies that the event is special in a way described by the name.

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

These enums are defined in the corhdr.h file and are a combination of bits and enumerators.

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 MyApplication
{
   public delegate void MyEvent(Object temp);
   public static void Main()
   {
      TypeBuilder helloWorldClass = CreateCallee(Thread.GetDomain());

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

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

      // Create the events.
      EventBuilder myEvent1 = helloWorldClass.DefineEvent("Click", EventAttributes.None,
         typeof(MyEvent));
      myEvent1.SetRaiseMethod(myMethod1);
      EventBuilder myEvent2 = helloWorldClass.DefineEvent("MouseUp", EventAttributes.None,
         typeof(MyEvent));
      myEvent2.SetRaiseMethod(myMethod2);

      helloWorldClass.CreateType();
      return(helloWorldClass);
   }
}

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

XNA Framework

Supported in: 3.0, 2.0, 1.0

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone Silverlight 8.1, Windows Phone Silverlight 8

Portable Class Library

Supported in: Portable Class Library
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