If an attacker submitted a malicious __VIEWSTATE payload, the attacker could potentially trick the application into performing an action that it otherwise would not have performed. To prevent this kind of tampering attack, the __VIEWSTATE field is protected by a message authentication code (MAC).

ASP.NET will now emit a SameSite cookie header when HttpCookie.SameSite value is 'None' to accommodate upcoming changes to SameSite cookie handling in Chrome. As part of this change, FormsAuth and SessionState cookies will also be issued with SameSite = 'Lax' instead of the previous default of 'None', though these values can be overridden in ...

ASP.NET sequentially executes requests that have the same SessionID, which means you may see the requests piling up in the queue if there are lots of concurrent requests that have the same SessionID. After you apply this fix, you can limit the number of the requests in the queue through the following AppSetting:

This article describes how to develop .aspx pages that use code-behind class files in Microsoft ASP.NET applications. The code samples in this article include the requirements for both code-behind class files that are precompiled and code-behind class files that are compiled on demand.

With the Chart Web Component, you can create charts using data from various sources, such as arrays, a databases, spreadsheets, or any custom data sources. Once you create a chart, you can use the ExportPicture method of the Chart Component to generate a GIF image of that chart.

Describes a security update that resolves a vulnerability in ASP.NET MVC that could allow security feature bypass if an attacker convinces a user to click a specially crafted link or to go to a webpage that contains specially crafted content.

The .NET Framework Repair Tool provides an option to repair the versions of .NET Framework that are installed on the computer (step 3 of the process in the "Repair Tool options" section). The tool requires the redistributable files of those versions to be available at the time of repair.

The Microsoft .NET Framework 4.6 is a highly compatible in-place update to the Microsoft .NET Framework 4, the .NET Framework 4.5, the .NET Framework 4.5.1, and the .NET Framework 4.5.2. Wherever possible, Microsoft recommends you use the Web Installer instead of the Offline Package for optimal efficiency and bandwidth requirements.

The Microsoft .NET Framework 4.8 is a highly compatible, in-place update to the Microsoft .NET Framework 4, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1 and 4.7.2. The offline package can be used in situations in which the web installer cannot be used because of lack of Internet connectivity.

Option 1: Get a newer Outlook email app which supports Modern Authentication. If your Outlook client does not support Modern Authentication, you will need to upgrade to the latest version and then setup using Outlook.com Sync.