How do I convert a string to an integer in C#?
int myInt = System.Convert.ToInt32(myString);
As several others have mentioned, you can also use int.Parse() and int.TryParse().
If you're certain that the string will always be an int:
int myInt = int.Parse(myString);
If you'd like to check whether string is really an int first:
int myInt;
bool isValid = int.TryParse(myString, out myInt); // the out keyword allows the method to essentially "return" a second value
if (isValid)
{
int plusOne = myInt + 1;
}