System.Collections.Generic.IEnumerable' does not contain any definition for 'ToList'

Question

Here is the problem. I am getting IEnumerable from ViewPage and when I tried it to convert List it is showing me error like:

\'System.Collection

Answer 1

Are you missing a using directive for System.Linq?

http://msdn.microsoft.com/en-us/library/bb342261.aspx

Answer 2

You're missing a reference to System.Linq.

Add

using System.Linq

to get access to the ToList() function on the current code file.

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To give a little bit of information over why this is necessary, Enumerable.ToList<TSource> is an extension method. Extension methods are defined outside the original class that it targets. In this case, the extension method is defined on System.Linq namespace.

Answer 3

I was missing System.Data.Entity dll reference and problem was solved

Answer 4

In my case, I had copied some code from another project that was using Automapper - took me ages to work that one out. Just had to add automapper nuget package to project.

Answer 5

An alternative to adding LINQ would be to use this code instead:

List<Pax_Detail> paxList = new List<Pax_Detail>(pax);