Hi Vignesh, please be careful about which forum you use. If your post wasn’t flagged as spam, I would have never noticed this question in Dynamics 365 Customer Engagement forum.
As you see, calling toString() on CLRObject (containing System.Text.RegularExpressions.Match object) isn’t a good approach. You need to use properties or methods of System.Text.RegularExpressions.Match class to get the information you want.
For example, you could do this:
System.Text.RegularExpressions.Match dateMatch = System.Text.RegularExpressions.Regex::Match(inputString, pattern);
if (dateMatch.get_Success())
{
extractedDate = dateMatch.get_Value();
}