How to Invoke Method with parameters from text

I am trying to develop a template engine in c# and in my concept I will need to read to read methods as well as parameters from text files.This shows something could be done , but it does not work if the parameter is also read from the text.Is there a way to achieve this?

        private static void Main(string[] args)
        {
            var stringFunction="AMethod(\"Hello\")";
            string returnValue = Execute(stringFunction);
            //the result in retunValue is same as from code commented below:
            // string returnValue= AMethod("Hello");
        }

        public static string AMethod(string parameter)
        {
            return "xyz" + parameter;
        }