Delegate for an Action

Question

I'm trying to create a delegate of a static method which takes a ref argument. Please don't ask why I'm doing such a cockamamie thing. It's all part of learning how .Net, C#, and reflection work and how to optimize it. My code is: ``` public struct DataRow { private double t; static public void Cram_T(ref DataRow dr, double a_t) { dr.t = a_t; } } '''' Type myType = typeof(DataRow); MethodInfo my_Cram_T_Method = myType.GetMethod("Cram_T"); var myCram_T_Delegate = Delegate.CreateDelegate(typeof(Action), my_Cram_T_Method) as Action; ``` This gives me a binding error because (I think) the generic action doesn't match the method. Inspecting the value of Cram_T_Method in the watch window gives ``` {Void Cram_T(DataRow ByRef, Double)} ``` I then tried using the ref keyword in the Action: ``` var myCram_T_Delegate = Delegate.CreateDelegate(typeof(Action), my_Cram_T_Method) as Action; ``` But this won't compile. The C#…

Accepted Answer

Create your own delegate type:

```
delegate void MyAction(ref DataRow dataRow, double doubleValue);
```

And use `MyAction` in place of `Action<ref DataRow, Double>` -- which, as you've noted, doesn't compile.

Delegate for an Action< ref T1, T2>

Solution

Problem