Use same method to add 1 to a casted string that can be either float or int

Question

Think this is a generic vs type specific problem. I would like to add a unit to a string casted argument that can be an int or a float. I tried the following, but there is problem at the time of the cast because the type is not known at compile time.

namespace ConsoleApp17
{
    class Program
    {
        static int myInt = 1;
        static float myFloat = 2f;

        static void Main(string[] args)
        {
            string myFloatStr = "1.3";
            string myIntStr = "2";
            Add<float>(myFloatStr, SetNewFloatValue);
            Add<int>(myIntStr, SetNewIntValue);

            Console.ReadLine();
        }


        public static void Add<T>(string str, Action<T> action)
        {
            T valueToSet = (T)Math.Round(double.Parse(str) + 1, 0 , MidpointRounding.AwayFromZero); //problem here, cannot convert double to T
            action(valueToSet);
        }

        private static void SetNewFloatValue(float floatArg) {
            myFloat += floatArg;
        }

        private static void SetNewIntValue(int intArg)
        {
            myInt += intArg;
        }

    }

}

fiddle in case its helpful. Is method overload for each of the arguments the only solution for this, or is there a more elegant solution so that the same funtionality can be dealt with in the one same method for both types float and int?

Meaning that:

Add<float>(myFloatStr, SetNewFloatValue);
Add<int>(myIntStr, SetNewIntValue);

could be done with the one same method.

Answer 1

If you are using older versions than .Net 6, you can use Convert.ChangeType for your case.

T valueToSet = (T)Convert.ChangeType(Math.Round(double.Parse(str) + 1, 0, MidpointRounding.AwayFromZero), typeof(T));