public event EventHandler<EventArgs> someEvent;

private EventHandler<EventArgs> someEvent = null;

[MethodImpl(MethodImplOptions.Synchronized)]
public void add_someEvent(EventHandler<EventArgs> value){
   someEvent = (EventHandler<EventArgs>)Delegate.Combine(someEvent, value);
}

[MethodImpl(MethodImplOptions.Synchronized)]
public void remove_someEvent(EventHandler<EventArgs> value){
   someEvent = (EventHandler<EventArgs>)Delegate.Remove(someEvent, value);

.method family hidebysig newslot virtual instance class System.Delegate RemoveImpl(class System.Delegate d) cil managed
{
    .maxstack 8
    L_0000: ldarg.1 
    L_0001: ldarg.0 
    L_0002: callvirt instance bool System.Object::Equals(object)
    L_0007: brtrue.s L_000b
    L_0009: ldarg.0 
    L_000a: ret 
    L_000b: ldnull 
    L_000c: ret 
}