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As I understand it, C#'s foreach iteration variable is immutable. Which means I can't modify the iterator like this: foreach (Position Location in Map) { // We want to fudge the position to hide the exact coordinates Location = Location + Random(); // Compiler Error Plot(Location); } I can't modify the iterator variable directly and instead, I have to use a for loop for (int i = 0; i < Map.Count; i++) { Position Location = Map[i]; Location = Location + Random(); Plot(Location); i = Location; } Coming from a C++ background, I see foreach as an alternative to the for loop. But with the above restriction, I usually fallback to using the for loop. I'm curious, what is the rationale behind making the iterator immutable? Edit: This question is more of a curiousity question and not as a coding question. I appreciated the coding answers but I can't mark them as answers. Also, the example above was over-simplified. Here is a C++ example of what I want to do: // The game's rules: // - The "Laser Of Death (tm)" moves around the game board from the // start area (index 0) until the end area (index BoardSize) // - If the Laser hits a teleporter, destroy that teleporter on the // board and move the Laser to the square where the teleporter // points to // - If the Laser hits a player, deal 15 damage and stop the laser. for (int i = 0; i < BoardSize; i++) { if (GetItem(Board[i]) == Teleporter) { TeleportSquare = GetTeleportSquare(Board[i]); SetItem(Board[i], FreeSpace); i = TeleportSquare; } if (GetItem(Board[i]) == Player) { Player.Life -= 15; break; } } I can't do the above in C#'s foreach because the iterator i is immutable. I think (correct me

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