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This month Keith Brown digs into the new eventing system in Windows Vista, Windows Eventing 6.0.

You'd be surprised how much you already know about mobile app development. If you use Visual Studio 2005 to code Windows desktop or Web apps, then you have everything you need to get started in this fast-growing market. Find out just what you already know and how to bridge the gap between desktop and mobile. Also learn some tips for coding both mobile client and mobile Web apps.

The Local Security Authority, or LSA, has been included in the Windows operating systems since Windows 2000. LSA is responsible for account validation, management of local security policy, auditing, maintaining sessions and the generation of tokens for login and impersonation. At times you may want to determine what users are logged onto a machine, be it local, remote or system service accounts. LSA maintains a range of information, including usernames, domain information, login times, the authentication package used, SIDs and terminal services session information. Unfortunately, .NET doesn't provide a simple way to interact with LSA, so you have to Interop with the LSA functions directly to enumerate user sessions and extract data.

Windows CardSpace replaces traditional username and password authentication with a tool that helps users better manage their digital identities and helps shield users from various forms of identity attack such as phishing. Michиle Leroux Bustamante explains how to integrate Windows CardSpace with your ASP.NET applications and Windows Communication Foundation services.

Understanding how the SQL Server and CLR security models work together to keep your database secure

The labyrinth of security features for WCF is intricate and at times even overwhelming. At its core, however, are a basic set of security principals for authentication, authorization, and message transfer protection.

Useful concurrency classes and small test bench in C#

Freeze parts of the user interface until all drawings are done, and blend old content with the new one smoothly.

Discussion of securing text in an application. The example project contains a SecureString wrapper to make working with SecureString easier, and a textbox that directly manipulates a SecureString.

The most popular instrument to access database data for .NET applications is ADO.NET. This set of components contains three main classes those are used to manipulate and store data: DataReader, DataSet and DataAdapter. DataReader is only able to read data and can't work as data source for data-aware components like DataGridView; DataSet provides all interfaces to be a data source but disconnected model considers some restrictions that can become important for some kind of applications, especially for desktop programs that work under multiuser concurrent environment and change database data actively. Below we consider main restrictions and popular ways to solve them; non standard solutions are considered also.