How to validate a date of birth (age) if minimum is 18 in C#

[Lucfan]

I have a textbox and a button and my code is like this:

DateOfBirth = DOB(TextBox1.Text);
        try
        {
 
            if (string.IsNullOrEmpty(TextBox1.Text))
            {
            }
 
            else
            {
 
                DateOfBirth = Strings.Trim(TextBox1.Text.ToString());
                DateTime DOB = DateOfBirth;
                int Years = 0;
                int Month = 0;
                int Days = 0;
                string StrAge = null;
 
                if (DOB < DateTime.Now)
                {
                    TimeSpan dateDiff = DateTime.Now - DOB;
                    DateTime age = new DateTime(dateDiff.Ticks);
                    Years = age.Year - 1;
                    Month = age.Month - 1;
                    Days = age.Day - 1;
                    StrAge = ((Years.ToString() + " Years ") + Month.ToString() + " Months ") + Days.ToString() + " Days ";
 
                    ElseStrAge = "Entered Date Of Birth is less then Current Date";
                }
                LblStatus.Text = "Your Exact Age is : " + StrAge;
            }
        }
        catch (Exception ex)
        {
            Response.Write(ex);
        }
    }
 
 

ERROR that Im getting:

The name 'DateOfBirth' does not exist in the current context

Where must i declare this cause I've tried many ways.

[Rabbit]

You haven't declared DateOfBirth. You just start using it out of no where.

[ajinkya ragalwa]

Yeah.
I think rabbit is right.
Try declaring DateOfBirth globally.
It might help.
I might be wrong.


Regards
Ajinkya