windows Application Database Connection c#
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Im facing problem with database connection on windows Application Database Connection c#... here is my connection ,,, PC2 is PCNAme
    
    private static SqlConnection con = new SqlConnection("Data Source=PC2\\SQLEXPRESS; Initial Catalog=Database1;Integrated Security=True");  

when I run the form I get this unhandled exception on con.Open();

sqlException was unhandeled:
A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)


hope some one can help Im trying to solve it for many hours but not working.

