how can i compare the dates in C#.net

Don't compare strings with string representation of dates, compare time values in the form of structure System.DateTime.First of all, do you really have to enter this data in edit box? Is some date-time or calendar picker feasible? — it would provide you with the value of the structure...

You should use "date time picker" control instead of text boxes this is more professional as a developer.

DateTime fromdate = Convert.ToDateTime(TextBox1.Text);DateTime todate = Convert.ToDateTime(TextBox2.Text);if (todate.CompareTo(fromdate) < 0){//add you logic}

First, you need to convert the text to a DateTime value. From there, you can use DateTime.Compare[^] for this one. Check out the link.

Convert the dates to DATETIME object withDateTime.ParseExact()and then compare with comparison operator <

Use this:DateTime fromdate = Convert.ToDateTime(TextBox1.Text);DateTime todate = Convert.ToDateTime(TextBox2.Text);if (todate.CompareTo(fromdate) < 0){//your code}

string s = "2011-06-16T05:07:57+0000";string t = "2011-07-16T06:07:57+0000";DateTime theDateA = DateTime.Parse(s);DateTime theDateB = DateTime.Parse(t);if (theDateB > theDateA){ // blah blah}Give it a try