is order of field important in anonymous types automatic initialization?

Question

I got a scenario to create the anonymous list from the anonymous types, and i achieved that using

    public static List MakeList(T itemOf         


        

Answer 1

Yes, it's important.

Two anonymous type initializers use the same auto-generated type if the property names and types are the same, in the same order.

The order becomes relevant when hashing; it would have been possible for the type to be generated with a consistent order for calculating a hash value, but it seems simpler to just include the property order as part of what makes a type unique.

See section 7.5.10.6 of the C# 3 spec for details. In particular:

Within the same program, two anonymous object initializers that specify a sequence of properties of the same names and compile-time types in the same order will produce instances of the same anonymous type.