Should SqlConnection be disposed?

If you called Dispose method SqlConnection object state will be reset. If you try to call any method on disposed SqlConnection object, you will receive exception. That said: If you use connection object one time, use Dispose .

Does SqlConnection close on dispose?

If the SqlConnection goes out of scope, it won’t be closed. Therefore, you must explicitly close the connection by calling Close or Dispose . Close and Dispose are functionally equivalent.

Does SqlCommand need to be disposed?

The component class (which remember the SqlCommand indirectly inherits from), implements such a Dispose method. Therefore to prevent the finalizer from running (and even though it does nothing in the case of SqlCommand), you should always call Dispose.

What dispose connection?

Connection. Dispose() will clean up completely, removing all unmanaged resources preventing that Connection from being used again. Once disposed is called you shouldn’t try to use the object any more.

Does Dispose call close?

To do it right, you just need to know that Dispose() calls Close() (a pretty intimate piece of implementation trivia). Further, in the Dispose(bool) cases, you need to ignore Dispose() and just write a Dispose(bool) implementation that makes sure to chain the base class method.

What does dispose method to with connection object?

Deletes it from the memory.

Does using automatically close SqlConnection?

CloseConnection to close your Connection object automatically when your DataReader closes. (Thanks for the lead in Wolfgang!) The using statement will close all of your objects and dispose of them for you. This is one of my personal favorites as it can make development a lot easier.

What does Conn close () do?

The close() operation closes the connection–it doesn’t do anything to the connection reference. You might not be able to do anything with the connection, but it’s not null. Once it’s closed it can be released back into a collection pool, but that’s something different yet again.

Is it necessary to manually close and dispose of Sqldatareader?

You don’t need the . Close() statement in either sample: it’s handled by the . Dispose() call.

Do I need to dispose StreamReader?

Yes, StreamReader , StreamWriter , BinaryReader and BinaryWriter all close/dispose their underlying streams when you call Dispose on them. They don’t dispose of the stream if the reader/writer is just garbage collected though – you should always dispose of the reader/writer, preferrably with a using statement.

Does StreamWriter need to be closed?

You must call Close to ensure that all data is correctly written out to the underlying stream. Following a call to Close, any operations on the StreamWriter might raise exceptions. If there is insufficient space on the disk, calling Close will raise an exception.

When should you call Dispose?

Rule of thumb: if a class implements IDisposable you should always call the Dispose method as soon as you have finished using this resource. Even better wrap it in a using statement to ensure that the Dispose method will be called even if an exception is thrown: using (var reader = conn. ExecuteReader()) { }