public void AddEventHandler(object target, Delegate handler)
{
if (this.cached_add_event == null)
{
MethodInfo addMethod = this.GetAddMethod();
if (addMethod == null)
{
throw new InvalidOperationException("Cannot add a handler to an event that doesn't have a visible add method");
}
if (addMethod.DeclaringType.IsValueType)
{
if (target == null && !addMethod.IsStatic)
{
throw new TargetException("Cannot add a handler to a non static event with a null target");
}
addMethod.Invoke(target, new object[]
{
handler
});
return;
}
else
{
this.cached_add_event = EventInfo.CreateAddEventDelegate(addMethod);
}
}
this.cached_add_event(target, handler);
}