Added some rules for the moves

Qwirkle/QwirkleClassLibrary/Game.cs

@@ -23,7 +23,7 @@ namespace QwirkleClassLibrary
 
         public Game()
         {
-            bag = CreateTileBag(3);
+            bag = CreateTileBag(1);
             board = CreateBoard();
         }
 
@@ -63,7 +63,7 @@ namespace QwirkleClassLibrary
 
         public Board CreateBoard()
         {
-            board = new Board(12, 12);
+            board = new Board(5, 5);
             return board;
         }
         
@@ -112,7 +112,7 @@ namespace QwirkleClassLibrary
             {
                 for (int j = 0; j < 6; j++)
                 {
-                    int val = RandomNumberGenerator.GetInt32(0, bag.TilesBag.Count + 1);
+                    int val = RandomNumberGenerator.GetInt32(0, bag.TilesBag.Count);
 
                     p.AddTileToPlayer(bag.TilesBag[val]);
                     bag.RemoveTileInBag(bag.TilesBag[val]);
@@ -221,10 +221,11 @@ namespace QwirkleClassLibrary
             surroundingTiles.Add(b.GetCell(x, y + 1)?.GetTile);
             surroundingTiles.Add(b.GetCell(x, y - 1)?.GetTile);
 
-            foreach (var tile in surroundingTiles)
+            foreach (var tile in surroundingTiles.ToList())
             {
                 if (tile == null)
                 {
+                    surroundingTiles.Remove(tile);
                     continue;
                 }
                 
@@ -234,9 +235,12 @@ namespace QwirkleClassLibrary
                 }
             }
             
+            if(surroundingTiles.Count == 0) return false;
+            
             return true;
         }
 
+            
         public bool IsGameOver()
         {
             return false;

Qwirkle/QwirkleConsoleApp/Program.cs

@@ -71,13 +71,20 @@ static void AddTile(Game game)
     Write("Enter the y of the cell : ");
     int y = Convert.ToInt32(ReadLine());
 
-    if (game.PlaceTile(game.GetPlayingPlayer(), tile, x, y) == true)
+    if (game.IsMoveCorrect(tile, x, y, game.GetBoard()) == true)
     {
-        WriteLine("ok ! your tile is placed");
+        if (game.PlaceTile(game.GetPlayingPlayer(), tile, x, y) == true)
+        {
+            WriteLine("ok ! your tile is placed");
+        }
+        else
+        {
+            WriteLine("ERROR : Cell already used");
+        }
     }
     else
     {
-        WriteLine("ERROR : Cell already used");
+        WriteLine("ERROR : Move not correct");
     }
 }
 
@@ -156,9 +163,9 @@ static void ShowBoard(Game game)
     {
         for(int y=0; y<board.Columns; y++)
         {
-            if(board.GetCell(i, y).IsFree == false)
+            if(board.GetCell(i, y)!.IsFree == false)
             {
-                Tile tile = board.GetCell(i, y).GetTile;
+                Tile? tile = board.GetCell(i, y)?.GetTile;
                 Console.Write("| " + tile.GetShape.ToString()[0] + tile.GetShape.ToString()[1] + tile.GetColor.ToString()[0]  + " |");
             }
             else