2nd use of using

[soosan]

hi
what is the 2nd use of the using statment in c#..
the first one is for referencing namespaces.
thanx

 

[Dave]

For automatically calling Dispose on the objects defined within the using
statement when the execution path leaves the scope of the using statement,
as in

using (someObject)
{
// do stuff here
}

 

[Elp]

For automatically calling Dispose on the objects defined within the using
statement when the execution path leaves the scope of the using statement,

And, as a practical example, you can use that when working with databases to
ensure that a connection is closed whatever happens (this avoid having to
use the heavy try/catch/finally patern):

try
{
using (SqlConnection conn = new SqlConnection(source))
{
conn.Open();
//do somthing with the connection
}
}
catch {}

Here, even if an exception occurs in the using statement, the connection
will be disposed (thus closed) properly.