Convert what you read from console into int
using System;
public class Program {
public static void Main(){
int newInteger = 0;
try {
System.Console.WriteLine("Enter an integer:");
newInteger = System.Convert.ToInt32(System.Console.ReadLine());
}
catch (System.ArgumentNullException) {
System.Console.WriteLine("String is null.");
}
catch (System.FormatException) {
System.Console.WriteLine("String does not consist of an " +
"optional sign followed by a series of digits.");
}
catch (System.OverflowException) {
System.Console.WriteLine(
"Overflow in string to int conversion.");
}
System.Console.WriteLine("Your integer as a double is {0}",System.Convert.ToDouble(newInteger));
}
}