Hello,
The initial task is to find all permutations of the byte array.byte [] SFP = new byte[8] { 0, 1, 2, 3, 4, 5, 6, 7 };I've found on some forum the following procedure: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 this way: var SFP_vars = Permute(SFP); It works fine - the query find all combinations.The problem is that I can't use foreach to have access to particular memberes of list.The foreach loop (see below) provoke the runtime error:InvalidCastException was unhandled. Unable to cast object of type '<UnionIterator>d__88`1[System.Byte]' to type 'System.Byte[]' Construction, that give error:foreach (byte[] SFP_var in SFP_vars){}How to circumvent the problem.Thanks in advance.Pavel.