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 ASP.NET error: "Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that <machineKey> configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster"

ASP.NET ERROR: Validation of viewstate MAC failed. If this application is hosted by a Web Farm or...

 How to enable detailed errors for ASP.NET applications

You can add the following lines to _WEB.CONFIG_ file under your .NET application to enable...

 How to enable support for Microsoft .NET Framework 3.5

All your shared Windows based servers already have .NET FRAMEWORK 3.5 installed. It does not...

 What is an Application Pool?

An Application Pool can contain one or more applications and allows us to configure a level of...

 You receive the NullReferenceException exception when you call the String.IsNullOrEmpty function in an application that is built on the .NET Framework 2.0

SOURSE http://support.microsoft.com/kb/940900/ [1] SYMPTOMS When you call the...