c # : Number OnlyTextbox

First

      - add two textbox ( txtType1, txtType2 )

      - add three label ( label1, label2, label3 )

Second

      - Right click on textType1 and choose properties

      - move to Events and double click on  KeyPress

Third

      - add this code

//Using 2.0 Framework function TryParse

int isNumber = 0;

int.TryParse(e.KeyChar.ToString(), out isNumber);

if (isNumber == 0)

e.Handled = true;

Second

      - Right click on textType2 and choose properties

      - move to Events and double click on KeyPress

Third

      - add this code

//Using Regular Expressions

if (!System.Text.RegularExpressions.Regex.IsMatch(e.KeyChar.ToString(), "\\d+"))

e.Handled = true;