put @ berore connection string

Happy Coding

string strcon = "Data Source=PURU\\SQLSERVER2005; uid=sa; password=; Initial Catalog=Data";

string strcon = @"Data Source=PURU\SQLSERVER2005; uid=sa; password=; Initial Catalog=Data";

I get that error message when trying to compile a program which connects to a database. I think the error
is with the following line:

string strcon = "Data Source=PURU\SQLSERVER2005; uid=sa; password=; Initial Catalog=Data";