SQL Server Connection string

//Windows authentication 1//string Strcon = @ "Data source=.\sqlexpress;initial catalog=db1;integrated security=true;                        Pooling=false "; //Windows Authentication 2//string Strcon = @ "server=.\sqlexpress;database=db1;integrated security=true;";//SQL Server Authentication 1//string Strcon = @ "server=.\sqlexpress;database=db1;uid=sa;pwd=123456"; //SQL Server Authentication 2//string Strcon = @ "Data source=.\sqlexpress;initial catalog=db1; User Id=sa; password=123456; Pooling=false ";            /*read the connection string from the configuration file add <connectionStrings> to the <configuration> tag <add name= "Strcon" connectionstring= "server=.\sqlexpress;database=db1;uid=sa;pwd=123456"/> </connec Tionstrings>*/            stringStrcon = configurationmanager.connectionstrings["Strcon"]. ConnectionString;

SQL Server Connection string