Variable scope and the 'using' statement in .NET

Posted by pete the pagan-gerbil on Stack Overflow See other posts from Stack Overflow or by pete the pagan-gerbil
Published on 2011-01-09T12:45:20Z Indexed on 2011/01/09 12:53 UTC
Read the original article Hit count: 267

Filed under:

.NET

|

using

If a variable is at class level (ie, private MyDataAccessClass _dataAccess;, can it be used as part of a using statement within the methods of that class to dispose of it correctly?

Is it wise to use this method, or is it better to always declare a new variable with a using statement (ie, using (MyDataAccessClass dataAccess = new MyDataAccessClass()) instead of using (_dataAccess = new MyDataAccessClass()))?

© Stack Overflow or respective owner

Related posts about .NET

Apt-Get Update: failure to fetch; can't connect to any sources

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
I realize there are dozens of "apt-get update: failure to fetch" questions (I read through all I could find), but my present circumstance is unique to 12.04 and it affects all sources; not just launchpad. Additionally, I've tried several different servers in Europe and the U.S. as well as the "main… >>> More
12.04: Apt-Get Update: failure to fetch; can't connect to any sources

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
I realize there are dozens of "apt-get update: failure to fetch" questions (I read through all I could find), but my present circumstance is unique to 12.04 and it affects all sources; not just launchpad. Additionally, I've tried several different servers in Europe and the U.S. as well as the "main… >>> More
What's New in ASP.NET 4

as seen on Geeks with Blogs - Search for 'Geeks with Blogs'
The .NET Framework version 4 includes enhancements for ASP.NET 4 in targeted areas. Visual Studio 2010 and Microsoft Visual Web Developer Express also include enhancements and new features for improved Web development. This document provides an overview of many of the new features that are included… >>> More
.NET Reflector 6, .NET Reflector Pro, TestDriven.NET, .NET 4.0 and Mono

as seen on Simple Talk - Search for 'Simple Talk'
By now you may well have noticed that .NET Reflector 6 and .NET Reflector Pro are out in the wild. The official launch happened today, although we actually put the software out last Thursday as part of a phased release plan to ensure that everything went smoothly today which, so far, it seems to have… >>> More
Redmine on Apache2 with Passenger issue

as seen on Server Fault - Search for 'Server Fault'
I installed Redmine and run it in Apache2 with the Passenger module. Apache2 boots, Passenger module gets loaded and the Redmine welcome page is shown, however when trying to login or navigate to other parts of the Redmine site, the browser keeps loading and loading and loading forever, although the… >>> More

Related posts about using

Perform a case insensitive match using Regex without using RegexOptions enumeration

as seen on Stack Overflow - Search for 'Stack Overflow'
Is it possible to do a case insensitive match in C# using the Regex class without setting the RegexOptions.IgnoreCase flag? What I would like to be able to do is within the regex itself define whether or not I want the match operation to be done in a case insensitive manner. I would like this regex… >>> More
JS: using 'var me = this' to reference an object instead of using a global array

as seen on Stack Overflow - Search for 'Stack Overflow'
The example below, is just an example, I know that I don't need an object to show an alert box when user clicks on div blocks, but it's just a simple example to explain a situation that frequently happens when writing JS code. In the example below I use a globally visible array of objects to keep… >>> More
Using DLL that using COM in C#

as seen on Stack Overflow - Search for 'Stack Overflow'
I have been writing DLL on C++, that will be use in C#. DLL have some function, where I call hres = CoInitializeEx(NULL, COINIT_MULTITHREADED); and next call hres = CoInitializeSecurity( NULL, -1, // COM authentication NULL, … >>> More
Display the first 5 file names using opendir() and $file using PHP

as seen on Stack Overflow - Search for 'Stack Overflow'
Hello, $d = opendir("docs"); while (($file = readdir($d)) !== false) { if (($file != ".") && ($file != "..")){ } } I want to be able to display the first 5 file names. Thanks Jean >>> More
create a dictionary using 2 lists using LINQ

as seen on Stack Overflow - Search for 'Stack Overflow'
I am trying to create a dictionary from 2 lists where one list contains keys and one list contains values. I can do it using for loop but I am trying to find if there is a way of doing it using LINQ. Sample code will be helpfull. Thanks!!!! >>> More