System.Array. does not contain a definition for “ToList”

The ToList method you are looking for is an extension method. Try adding this using directive to the top of your file:

using System.Linq;

By adding this using directive you are indicating to the compiler that any extension methods in that namespace should be imported. It’s kind of a shame that there isn’t more help from Visual Studio around importing extension methods (ReSharper does this rather nicely).

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