private void txt_Name_TextChanged(object sender, EventArgs e)
 {
     try
     {
         if (!VerificationEnter.IsAlphaNumeric(txt_Name.Text))
         {
             throw new Exception("Team name must be alphaNumeric");
         }
         else
         if (VerificationEnter.EmptyOrOnlySpace(txt_Name.Text))
         {
             throw new Exception("You should enter a team Name");
         }
         else
         {
             errorProvider1.SetError(txt_Name, "");
             stateValidation2 = true;
         }
     }
     catch (Exception ex)
     {
         errorProvider1.SetError(txt_Name, ex.Message);
         stateValidation2 = false;
     }
 }
        private void txt_NbrSubscribers_TextChanged(object sender, EventArgs e)
        {
            try
            {
                if (!VerificationEnter.IsNumeric(txt_NbrSubscribers.Text))
                {
                    throw new Exception("Number of subscribers must be Numeric");
                }

                else
                {
                    errorProvider1.SetError(txt_NbrSubscribers, "");
                    stateValidation3 = true;
                }
            }
            catch (Exception ex)
            {
                errorProvider1.SetError(txt_NbrSubscribers, ex.Message);
                stateValidation3 = false;
            }
        }