How to resolve ambiguity when argument is null?

Question

Compiling the following code will return `The call is ambiguous between the following methods or properties` error. How to resolve it since I can't explicitly convert `null` to any of those classes? ``` static void Main(string[] args) { Func(null); } void Func(Class1 a) { } void Func(Class2 b) { } ```

Accepted Answer

```
Func((Class1)null);
```

How to resolve ambiguity when argument is null?

Solution

Problem