C# Method overriding with delegates as parameters, compiler is not infering the input types

Question

Hi! Can you please help me here, why the compiler does not infer the lambda input parameter right?

Example:

void Test(Action<string> n)
{
}
void Test(Action<int,string> n)
{
}

Ok so when doing this:

obj.Test(x=>{}); // compiler doesn't know x is a string

If I do this:

obj.Test((x,y)=>{}); // that works, compiler know x is a int and y is a string

Looks like I will have to specify the input parameter type (?)

obj.Test((string x) => {}) // <-- Prefer not doing this

So any reasons why the compiler can't get the type right?

Thanks! Carlos

Answer 1

Looking at your screenshot, the problem is quite simple. Your method name Test is the same as the enclosing class, Test. This is not allowed, and in fact, you should receive the compiler error:

'Test': member names cannot be the same as their enclosing type

Answer 2

I just tried to recreate the problem with Visual Studio 2008, and did a screen capture here: http://screencast.com/t/YTAwNmQ4M

I was not able to reproduce the problem. I have seen Visual Studio do things like this in the past, but building always works, and often it is a memory issue. Closing Visual Studio, along with other programs that might be taking a lot of memory, and then starting Visual Studio back up has often helped.

So, basically, my answer is, "did you try turning on off, and then back on again?"