.net & .NET

Single sign-in You, like many other developers today, take advantage of multiple cloud services when developing your applications. For example, you've probably added a cloud backend to your applications to store data, stored your source code in the cloud, or published an application to a store. In the past, each of these services required a separate sign-in process, and each service managed the signed-in user state separately. With this release, reducing the authentication prompts required to access many integrated cloud services in Visual Studio. Now, when you authenticate to the first cloud service in Visual Studio, will automatically sign you in, or reduce the authentication prompts for other integrated cloud services. CodeLens In CTP 6, you can now see the history of your C++, SQL, or JavaScript files versioned in Git repositories by using CodeLens file-level indicators. Code Maps When you want to understand specific dependencies in your code, visualize them by cr...

ASP.NET 5 has been largely rewritten from the ground up, and incorporates some radical changes when compared with previous versions of ASP.NET. One of the biggest changes is in the HTTP Pipeline. This article looks at how those changes impact the design and registration of plug and play components that used to be represented by HttpModules. full blog 

  Razor - a new view engine from asp.net

Within the type system of a programming language , covariance and contravariance refers to the ordering of types from narrower to wider and their interchangability or equivalence in certain situations (such as parameters, generics, and return types). covariant: converting from narrower (float) to wider (double). contravariant: converting from wider (double) to narrower (float). invariant: Not able to convert (Null). Concept Of Variance : If y is derived from X and y relates to X then we can assign X to y. Like X=y. This is Covariance. If Y is derived from X and y relates to X then we can assign y to X. Like y = X. This is Contravariance. If class A is related to B then B is related A. Covariance Class B: A then we can assign A = B Contravariance Class B: A then we can assign B = A Example Class String : Object Covariance => Object=string; Contravariance=> string=Object; Covariance interface and delegate must have ' In' keyword declaration f...

What’s New in WF4 The significant changes made were necessary to provide the best experience for developers adopting WF and to enable WF to continue to be a strong foundational component that you can build on in your applications. The new framework components are found primarily in the System.Activities.* assemblies while the backwards compatible framework components are found in the System.Workflow.* assemblies.  The System.Workflow.* assemblies are part of the .NET Framework 4 and provide complete backward compatibility so you can migrate your application to .NET 4 with no changes to your workflow code. Designers One of the most visible areas of improvement is in the workflow designer. Usability and performance were key goals for the team for the VS 2010 release.  The designer now supports the ability to work with much larger workflows without a degradation in performance and designers are all based on Windows Presentation Foundation (WPF), taking full advantage of the ric...

Introductory Videos Creating Your First WCF Service Configuring Services with Endpoints Hosting WCF Services in IIS Self-hosting WCF Services Creating Your First WCF Client Configuring WCF Service References

A memory-mapped file contains the contents of a file in virtual memory and is an application’s logical address space. This mapping between a file and memory space enables an application, including multiple processes, to modify the file by reading and writing directly to the memory. Starting with the .NET Framework version 4, you can use managed code to access memory-mapped files in the same way that native Windows functions access memory-mapped files, as described in Managing Memory-Mapped Files in Win32 in the MSDN Library. There are two types of memory-mapped files: Persisted memory-mapped files Persisted files are memory-mapped files that are associated with a source file on a disk. When the last process has finished working with the file, the data is saved to the source file on the disk. These memory-mapped files are suitable for working with extremely large source files. The following illustration shows memory-mapped files that are persisted to disk. Non-persisted memory-...