'Delegate 'System.Action' does not take 0 arguments.' Is this a C# compiler bug (lambdas + two projects)?

Question

Consider the code below. Looks like perfectly valid C# code right?

//Project B
using System;
public delegate void ActionSurrogate(Action addEvent);
//public          


        

Answer 1

This probably is a problem with type inferance, apperently the compiler infers a as an Action instead of Action (it might think a is ActionSurrogate, which would fit the Action> signature). Try specifying the type of a explicitly:

    ActionSurrogate b = (Action a) =>
                        {
                            a();
                        };

If this is not the case - might check around your project for any self defined Action delegates taking one parameter.