C# :: Check Input Date Between 2 Dates (not SQL)

In my WinForm, Our client insists to use Textbox instead of DateTimePicker field, and they want to input in ddmmyy format.

Using Visual Studio 2010 C# 4.0.

PC date time setting: GMT +08:00 dd-MMM-yy.

Assumed today date is 291014 (29-Oct-14).

CodeBehind:

DateTime inputDate;
// the WinForm allows user to input date not earlier than 2 years before today date and not more than 1 months from today date too.
//Assumed I input date as 261014 (26-Oct-14)
if(DateTime.TryParseExact(input, "ddMMyy", new System.Globalization.CultureInfo("en-US"), System.Globalization.DateTimeStyles.None, out inputDate)) {
DateTime minDate = DateTime.Now.AddMonths(-24);//Assumed it is 29-Nov-14
DateTime maxDate = DateTime.Now.AddMonths(1);//Assumed it is 29-Oct-12

I tried many methods but none works (I have checked many threads/forums also).

//Method 1
if(inputDate >= minDate && inputDate <= maxDate)
return true

//Method 2: B return true but A ***always*** return false, Why??
if (inputDate >= minDate)
A = true;

[code]....