C#:Convert a String to a Number

The static method int.Parse will an integer from a string

There is a danger that the string does not represent a valid number in which case an exception will be raised.

The class Convert may also be used for parsing strings.

Other Parse methods are available with the other base types: float.Parse long.Parse double.Parse bool.Parse

Other Convert methods include Convert.ToInt32 Convert.ToInt64 Convert.ToBoolean Convert.ToSingle Convert.ToDouble

The value "1234" is a string, you need to treat it as a number - to add 1, giving 1235.