How to identify type of input read from the keyboard in C# ?

Question

if the input is given as '2' or such then it should print it as integer and if string then to print as string

Answer 1

You can convert the input to an integer
int.parse(Console.Read()) .. output is read as a string

Answer 2

use int.TryParse(), it will try to parse it as an integer but if it fails you can just assign it as a string and you wont have to do any exception handling

Answer 3

I think you can use regular expression to define several templates to match many data types such as integer, real number, complex number, telephone number :-D, string, or more specifically string like email address, proper names, etc.