Regular expressions doesn't work

i am trying using regex but it isn’t work . what can have to import can you please tell me anyone

Try

system.text.RegularExpressions.Regex.Match

Go to Imports Panel
Import your Regular Expression Settings…
System.Text.RegularExpressions

Go to Imports Panell Which is beside your Variables panel

Type System.Text.RegularExpressions over there.

If Still the error occurs then Restart your Uipath as well as your Machine.

Thanks,
Raja.