PhraseSet filling moved out to separate method

dotnet/WhiteRabbit/PhraseSet.cs

@@ -15,11 +15,20 @@
 
             fixed (long* bufferPointer = this.Buffer)
             {
-                long* longBuffer = (long*)bufferPointer;
-                int numberOfWords = wordIndexes.Length;
-
                 fixed (ulong* permutationsPointer = permutations)
                 {
+                    fixed (int* wordIndexesPointer = wordIndexes)
+                    {
+                        FillPhraseSet(bufferPointer, allWords, wordIndexesPointer, permutationsPointer, permutationOffset, numberOfCharacters, wordIndexes.Length);
+                    }
+                }
+            }
+        }
+
+        private static unsafe void FillPhraseSet(long* bufferPointer, Word[] allWords, int* wordIndexes, ulong* permutationsPointer, int permutationOffset, int numberOfCharacters, int numberOfWords)
+        {
+            long* longBuffer = (long*)bufferPointer;
+
             var currentPermutationPointer = permutationsPointer + permutationOffset;
             for (var i = 0; i < Constants.PhrasesPerSet; i++, currentPermutationPointer++)
             {
@@ -43,7 +52,6 @@
 
                 longBuffer += 4;
             }
-                }
 
             var length = numberOfCharacters + numberOfWords - 1;
             byte* byteBuffer = ((byte*)bufferPointer) + length;
@@ -61,7 +69,6 @@
                 uintBuffer += 8;
             }
         }
-        }
 
         public unsafe byte[] GetBytes(int number)
         {