Could not use Delegate's Method Property in C#?

Question

When i try to use Delegate's Method Property in C# i get this error.

'myDelegate' does not contain a definition for 'Method' and no extension method 'Method' accepting a first argument of type 'myDelegate' could be found (are you missing a using directive or an assembly reference?)

I really don't know the reason why i get this. My program is fairly simple and is based on delegates. Below it's code is given:

public delegate void myDelegate(int x);
public class Program
{
    public void Main(string[] args)
    {
        X x = new X();
        myDelegate d = x.InstanceProgress;
        Console.WriteLine(d.Method);
    }
}

class X
{
   public void InstanceProgress(int percent) => Console.WriteLine(percent);
}

I get error on this line:

Console.WriteLine(d.Method);

See this image below, although i get the proper output but i get the error. I have marked the error with green arrow on the image.

Just so you know, its "delegate" not "deligate" (though a deligate sounds somewhat delicious...) — BradleyDotNET
– BradleyDotNET, Commented Jun 15, 2017 at 19:26
What method from InstanceProgress you want to execute? Obviously, InstanceProgress does not contain Method in its definition. Is this some example from some book or something similar? — freshbm
– freshbm, Commented Jun 15, 2017 at 19:30
So it seems like the appropriate thing to do here is to raise this as a bug with Microsoft — ColinM
– ColinM, Commented Jun 15, 2017 at 22:18

Cory · Accepted Answer · 2017-06-15 19:49:05Z

1

Looking at OP's screenshot. That looks like a Visual Studio error. And since it lets you build the it's not a true error. I don't get that error in VS2015.

I'd clean the solution and restart visual studio. That should clear it.

Old:

You'll want to do something like this:

X x = new X();
myDeligate d = x.InstanceProgress;
d.Invoke(5);

// or as Rahul pointed out you can simply use
d(5);

Invoke() is what actually calls the method. Until then the delegate is just a pointer to the method that you want to call.

edited Jun 15, 2017 at 19:49

answered Jun 15, 2017 at 19:32

Cory

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6 Comments

Rahul Over a year ago

why not just d(5)?

yogihosting Over a year ago

this is not about invoking a method. .Method is a inbuilt property that provides the name and parameters of the method that will be invoke.

oerkelens Over a year ago

@yogihosting Then what would you expect to happen in your original code?

Cory Over a year ago

Then your delegate would need to point to a class instead of a method

Rahul Over a year ago

Well, though this is a correct answer but certainly OP isn't looking for the same. you might want to see OP's comment in question

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