How to Convert String Value into Integer Value in C#

Question : How to convert sting value into integer value ?

Answer :

Suppose str is a string that contain numeric value and we have to work numerical operation on that value then we have to convert it into integer for further process.

Example 

string str="5621";

int i;

i=int.Parse(str);

Now str is changed into integer value and we can perform a numerical task on it.