Instantiating generic types with anonymous types

Using generic constructors would require the anonymous types to be named, which is not possible. Alternatively, generic methods may be used to allow type inference to occur.

var anon = new { Foo = 1, Bar = 2 };
var anon2 = new { Foo = 5, Bar = 10 };
List<T> CreateList<T>(params T[] items) {
    return new List<T>(items);
}

var list1 = CreateList(anon, anon2);

In the case of List<T>, implicitly typed arrays may be converted to a List<T> through the ToList LINQ method:

var list2 = new[] {anon, anon2}.ToList();