Preventing Duplicate Record Insertion on Page Refresh

I have found a good article on preventing the duplicate record insertion on page refresh by Terri Mortan.
Check the article here http://aspalliance.com/687

Create New Account Manually

Try this

protected void Create_Click(object sender, EventArgs e)
{
MembershipCreateStatus createStatus;
MembershipUser newUser = Membership.CreateUser(Username.Text, Password.Text, Email.Text, passwordQuestion, SecurityAnswer.Text, true, out createStatus);

switch (createStatus)
{
case MembershipCreateStatus.Success:
CreateAccountResults.Text = "The user account was successfully created!";
break;

case MembershipCreateStatus.DuplicateUserName:
CreateAccountResults.Text = "There already exists a user with this username.";
break;

case MembershipCreateStatus.DuplicateEmail:
CreateAccountResults.Text = "There already exists a user with this email address.";
break;

case MembershipCreateStatus.InvalidEmail:
CreateAccountResults.Text = "There email address you provided in invalid.";
break;

case MembershipCreateStatus.InvalidAnswer:
CreateAccountResults.Text = "There security answer was invalid.";
break;

case MembershipCreateStatus.InvalidPassword:
CreateAccountResults.Text = "The password you provided is invalid. It must be seven characters long and have at least one non-alphanumeric character.";
break;

default:
CreateAccountResults.Text = "There was an unknown error; the user account was NOT created.";
break;

}
}

for more info visit
http://www.asp.net/Learn/Security/tutorial-05-cs.aspx
Good Luck

Method to Get Hijri Date

Try this method:

public static string ConvertDateString(string DATE_INS, int COND)
{
string functionReturnValue = null;
int CurrentDay;
int CurrentMonth;
int CurrentYear;
System.DateTime DateFrom;
DateFrom = Strings.Trim(DATE_INS);
CurrentDay = DateFrom.Day;
CurrentMonth = DateFrom.Month;
CurrentYear = DateFrom.Year;
if (COND == 1)
{
// من هجرى الى ميلادى
System.DateTime ConversionDate = new System.DateTime(CurrentYear, CurrentMonth, CurrentDay, new HijriCalendar());
functionReturnValue = ConversionDate;
}
else if (COND == 2)
{
CultureInfo higri_format = new CultureInfo("ar-SA"); higri_format.DateTimeFormat.Calendar = new HijriCalendar();
System.DateTime CurrentDate;
if (!Information.IsDate(DATE_INS))
{
functionReturnValue = "";
return;
// TODO: might not be correct. Was : Exit Function
}
CurrentDate = Convert.ToDateTime(DATE_INS);
functionReturnValue = CurrentDate.Date.ToString("dd/MM/yyyy", higri_format);
}
return functionReturnValue;
}
Good Luck