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Regular Expression C#

  1)       String should have lower case alphabets."^[a-z]+$" 2)       String should havealphabets. "^[a-zA-Z]+$" 3)       String having alphabets and length must be 4."^[a-zA-Z][a-zA-Z][a-zA-Z][a-zA-Z]$"or"^[a-zA-Z]{4}$ 4)         String having alphabets and length must be greater than 2 and less than 10."^[a-zA-Z]{3,9}$" 5)         Age validation must be 1 or 2 digit and integer."^\d{1,2}$""^[0-9]{1,2}$"or "^([0-9]|[0-9][0-9])$"or "^([0-9]|[0-9]{2})$" 6)       Mobile Number patter. digit 11 length."^[0-9]{11}$"; 7)         Mobile Number have 11 digits and starts with 03."^03[0-9]{9}$" 8)       Mobile Number starts with 03 next two char must be digits from 0 to 5 nextchar must be - and next 7 char must be digit"^03[0-5]{2}-[0-9]{7}$"
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CC Lab Task

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  Lab Task 1 ===================Screen Short===============   ===============code==================== using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows.Forms; using System.Text.RegularExpressions; using System.IO; using System.Collections;   namespace lab2 {     public partial class Form1 : Form     {         public Form1 ()         {             InitializeComponent();         }             private void btncomp_Click( object sender, EventArgs e)         {    ...
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