i have method: public static double c(string val) { return math.round(convert.todouble(val), 4); } where pass in string, , if double, want round return double, if string, want return string is. of parameters pass in strings start, how determine if string or double, , how rewrite methoed have return type flexible enough return either? ideally, use type variant in vba, dont think there analog in c#. the following try parse double . if returns true put double in output variable output ; else return false means val isn't double , should use string val instead. public static bool c(string val, out double output) { if (double.tryparse(val, out output)) { output = math.round(output, 4); return true; } else { output = 0; return false; } } use this: string val = "123.45678"; double output; if ( c(val, out output) ) { // use double output } else { // val isn't double, use val direc
