i see a error when i want to do the connection...

Hi I want to connect at BD my problem is this? conn.ConnectionString ="Data Source=STKEND09560\DEFAULT2; Initial Catalog=Northwind;Integrated Security=True"; try { int no; conn.Open(); SqlCommand cmd1 =newSqlCommand(); cmd1.Connection = conn; cmd1.CommandText ="Select * from Region"; no = cmd1.ExecuteNonQuery(); TxtFirstname.Text = no.ToString(); } catch (Exception ex) { Console.WriteLine("{0} Exception caught", ex); } finally { conn.Close(); }\ = Unrecognized escape sequence. Why do i see this message?

do it like below

conn.ConnectionString ="Data Source=STKEND09560\\DEFAULT2; Initial Catalog=Northwind;Integrated Security=True";

OR

conn.ConnectionString = @."Data Source=STKEND09560\DEFAULT2; Initial Catalog=Northwind;Integrated Security=True";