I'm still relatively new to C# and have only within the past several days been exposed to "IDisposables". I can grasp the concept of the using block to take care of objects which must be disposed of without needing to manually remember to call the .Dispose() method - convenient!

Let's say though that I start with a new SqlConnection which I handle within a using statement. Within that block of code I create some additional IDisposables, for example a SqlDataAdapter. Does that adapter need it's own using statement?

For example, if I have code...

using (SqlConnection myConnection = new SqlConnection()) 
{ 
    SqlCommand myCommand = new SqlCommand(); 
    SqlDataAdapter myAdapter = new SqlDataAdapter(); 
    // Do things 
}

... will myCommand and myAdapter be disposed of when myConnection is disposed of (since they are within the scope of that code block)? Or do I need multiple using statements, maybe something like:

using (SqlConnection myConnection = new SqlConnection()) 
{ 
    using (SqlCommand myCommand = new SqlCommand()) 
    { 
        using (SqlDataAdapter myAdapter = new SqlDataAdapter()) 
        { 
            // Do things 
        } 
    } 
}