Opens a database connection with the settings specified by the ConnectionString.
Assembly: System.Data (in System.Data.dll)
This method must be overridden with user-defined behavior. SqlConnection.Open will throw an exception if called again without first being closed.
Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.