Get the name of a method using an expression

by 
x => x.DoSomething

In order to make this compilable I see only two ways:

  1. Go non-generic way and specify it’s parameter as Action<string, string>
  2. Specify Action<string, string> as your target delegate type by yourself: GetMethodInfo<IMyInteface>(x => new Action<string,string>(x.DoSomething))

if you are ok to go with second one, which allows you to omit arguments then you can write your GetMethodInfo method as follows: 

    MemberInfo GetMethodInfo<T>(Expression<Func<T, Delegate>> expression)
    {
        var unaryExpression = (UnaryExpression) expression.Body;
        var methodCallExpression = (MethodCallExpression) unaryExpression.Operand;
        var methodInfoExpression = (ConstantExpression) methodCallExpression.Arguments.Last();
        var methodInfo = (MemberInfo) methodInfoExpression.Value;
        return methodInfo;
    }

It works for your interface, but probably some generalization will be required to make this working with any method, that’s up to you.

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