You need to declare myid as int before you pass it to int.TryParse int myid; string input = Console.ReadLine(); bool isString = int.TryParse(input, out myid); 0 solved int.TryParse failing with Console.ReadLine() in C#
By default, double.TryParse uses the following flags from NumberStyles: NumberStyles.AllowThousands NumberStyles.Float, which is an alias for the following combination: NumberStyles.AllowLeadingWhite NumberStyles.AllowTrailingWhite NumberStyles.AllowLeadingSign NumberStyles.AllowDecimalPoint NumberStyles.AllowExponent You can use the other overload of TryParse to specify only a subset of these to your liking. In particular, you want to remove (at least) the AllowExponent flag. 0 solved … Read more