Working with Parsing I C# is quit simple

As per DotNet all predefined data types are predefined structures.

String -> int.Parse()
String -> byte.Parse()

Example 1: For printing the Limit of datatype

MessageBox.Show(int.MinValue.ToString());
MessageBox.Show(int.MaxValue.ToString());

Example 2: On Parsing:

private void button1_Click(object sender, EventArgs e)
{
MessageBox.Show(txt1.Text + txt2.Text);
int sal = int.Parse(txt1.Text);
int inc = int.Parse(txt2.Text);
int total = sal + inc;
MessageBox.Show(total.ToString());
}