C# Online Compiler | .NET Fiddle

using System;
using System.Linq;
using System.Linq.Expressions;
					
public class Program
{
	public class SubClass
	{
		public void MyMethod(string name, int value)
		{
	
		}
	}
	
	public static void Main(string[] args)
	{
		Console.WriteLine(
			MethodProcessor.CreateStringForCall&lt;SubClass&gt;(
			(o)=&gt;o.MyMethod("theName",4)));
	}

}

class MethodProcessor
{
    public static string CreateStringForCall&lt;T&gt;(Expression&lt;Action&lt;T&gt;&gt; methodCall)
    {
        var exp = methodCall.Body as MethodCallExpression;
        var retVal = string.Concat(exp.Method.Name, "/",
            string.Join("/", exp.Arguments.Cast&lt;ConstantExpression&gt;().Select(a =&gt; a.Value.ToString())));
        return retVal;
    }
}

 
using System;
using System.Linq;
using System.Linq.Expressions;
                    
public class Program
{
    public class SubClass
    {
        public void MyMethod(string name, int value)
        {
    
        }
    }
    
    public static void Main(string[] args)
    {
        Console.WriteLine(
            MethodProcessor.CreateStringForCall&lt;SubClass&gt;(
            (o)=&gt;o.MyMethod("theName",4)));
    }
​
}
​
class MethodProcessor
{
    public static string CreateStringForCall&lt;T&gt;(Expression&lt;Action&lt;T&gt;&gt; methodCall)
    {
        var exp = methodCall.Body as MethodCallExpression;
        var retVal = string.Concat(exp.Method.Name, "/",
            string.Join("/", exp.Arguments.Cast&lt;ConstantExpression&gt;().Select(a =&gt; a.Value.ToString())));
        return retVal;
    }
}
​

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