Read the error message: it's pretty clear.
Compiler Error Message: CS1010: Newline in constant
It's saying that you started a constant (string) but didn't finish it before the end of the line.
So look at the line - it's line 139 so CTRL+G in the editor will almost certainly take you right there - and see if you can see what we do:
else (Label1="select * from cs100020 where countno=3 and status=3);
^
|
Where is the closing quote?