How to convert the result of LINQ query to List

Question

Hello,

Here is function, that I use the list of permutations:
        public static IEnumerable<IEnumerable<T>> Permute<T>(IEnumerable<T> list)
        {
            if (list.Count() == 1)
                return new List<IEnumerable<T>> { list };

            return list.Select((a, i1) => Permute(
                            list.Where((b, i2) => i2 != i1)).Select(
                                    b => (new List<T> { a }).Union(b))
                            ).SelectMany(c => c);
        }

I use it in the following way:
var SFP_vars = Permute(SFP);

Where SFP is array of bytes:
byte[] SFP = new byte[7] { 0, 1, 2, 3, 4, 5, 6 };

There is other variable:
List<byte[]> lst_SFP = new List<byte[]>();

Now my question: How to assign the value of SFP_vars to lst_SFP ?
lst_SFP = SFP_vars.ToList() doesn't work.

Thanks in advance.

Pavel.