You may sometimes receive the below error if adding a new library to an existing project. It is also a common error when running older applications originally built for IIS 6 on newer versions of IIS.
HTTP Error 500.22 – Internal Server Error
An ASP.NET setting has been detected that does not apply in Integrated managed pipeline mode.
Luckily there are a couple of easy solutions to fixing this error:
The best way to explain the difference between
SelectMany in Linq is to show an example. In this example we will return a list of courses, each containing a list of students. You will see that
Select will return a list of lists of students while
SelectMany will flatten the lists into a single list of students.
To escape the Razor View’s @ symbol in an MVC project you can either use double @ signs:
Or you can use Html.Raw to display the symbol:
Visual Studio 2008 does not work with Team Foundation Server 2010 out of the box. Setting it up requires a few steps, here is what worked for me:
Assuming you already have VS2008 installed.
1) Install SP1 (optional, but may already be done): http://www.microsoft.com/en-us/download/details.aspx?id=10986
2) Install Visual Studio 2008 Team Explorer: http://www.microsoft.com/en-us/download/details.aspx?id=16338
Opening up a MVC4 project in Visual Studio 2010 can sometimes result in a missing System.Web.Optimization errors. You can install the missing packages by using the Package Manager Console from the Tools -> Library Package Manager menu as shown below.