Question

I have a class with an overloaded method:

MyClass.DoThis(Action<Foo> action);
MyClass.DoThis(Action<Bar> action);

I want to pass a lambda expression to the Action version:

MyClass.DoThis( foo => foo.DoSomething() );

Unfortunately, Visual Studio rightly cannot tell the difference between the Action<Foo> and Action<Bar> versions, due to the type inference surrounding the “foo” variable — and so it raises a compiler error:

The call is ambiguous between the following methods or properties: ‘MyClass.DoThis(System.Action<Foo>)’ and ‘MyClass.DoThis(System.Action<Bar>)’

What’s the best way to get around this?

Answer 1

MyClass.DoThis((Foo foo) => foo.DoSomething());