Switch case and generics checking

Question

I want to write a function that format int and decimal differently into string

I have this code:

and I want to rewrite it to generi

Answer 1

You could instead of using generics use IConvertible

    public static string FormatWithCommaSeperator(IConvertible value)
    {
            IConvertible convertable = value as IConvertible;
            if(value is int)
            {
                int iValue = convertable.ToInt32(null);
                //Return with format.
            }
            .....
    }