EventInfo.RemoveEventHandler(Object, Delegate) Method

Definition

Namespace:

System.Reflection

Assembly:

System.Runtime.dll

Source:

EventInfo.cs

Removes an event handler from an event source.

public:
 virtual void RemoveEventHandler(System::Object ^ target, Delegate ^ handler);

public virtual void RemoveEventHandler (object? target, Delegate? handler);

abstract member RemoveEventHandler : obj * Delegate -> unit
override this.RemoveEventHandler : obj * Delegate -> unit

Public Overridable Sub RemoveEventHandler (target As Object, handler As Delegate)

Parameters

target

Object

The event source.

handler

Delegate

The delegate to be disassociated from the events raised by target.

Exceptions

InvalidOperationException

The event does not have a public remove accessor.

ArgumentException

The handler that was passed in cannot be used.

TargetException

The target parameter is null and the event is not static.

-or-

The EventInfo is not declared on the target.

Note: In .NET for Windows Store apps or the Portable Class Library, catch Exception instead.

MethodAccessException

The caller does not have access permission to the member.

Note: In .NET for Windows Store apps or the Portable Class Library, catch the base class exception, MemberAccessException, instead.

Remarks

This method attempts to remove the delegate that may synchronize this event on the target object.

When an event is raised by target, the method or methods encapsulated by handler will no longer be invoked.

See also

• Object
• Delegate
• EventHandler