Account for net20

Author: Deterous

MPF.Processors/ProcessingTool.cs

@@ -1097,7 +1097,16 @@ public static bool IsValidSS(byte[] ss)
                 return false;
 
             // Drive entry table must be duplicated exactly
-            if (!ss.Skip(0x661).Take(0x730 - 0x661).SequenceEqual(ss.Skip(0x730).Take(0x7FF - 0x730)))
+
+#if NET20
+            var table1 = new byte[207];
+            Array.Copy(ss, 0x661, table1, 0, 207);
+            var table2 = new byte[207];
+            Array.Copy(ss, 0x730, table2, 0, 207);
+            if (Array.Exists(Enumerable.Range(0, a.Length).ToArray(), i => table1[i] != table2[i]))
+#else
+            if (!ss.AsSpan(0x661, 0x730 - 0x661).SequenceEqual(ss.AsSpan(0x730, 0x7FF - 0x730)))
+#endif
                 return false;
 
             // Remaining checks are only for Xbox360 SS