Question

Does placing a SqlCommand.Connection in a using block close the connection in the same way as placing the SqlConnection in it’s own using block? (Is #1 = #2)

Example 1

using (var cmd = GetCommandWithConnectionSetInternally(connString))
{ 
    using (cmd.Connection) 
    {

    }
}

Example 2

using(var conn = new SqlConnection(connString))
{
     using(var cmd = new SqlCommand(cmdText, conn))
     {

     }
 }

So, does the connection in Example 1 get closed as it would in Example 2 upon exiting the “using” block?

Answer 1

I can’t see it working any other way since using is just a short form of try {} finally {} with a Dispose call in the finally block. Since the resource object being used is cmd.Connection, it should get disposed.