Update threshold increasing

IDAstar.cs

@@ -177,7 +177,7 @@ namespace IdaStar
                 if (f > threshold) {
 					return f;
 				}
-				var min = f;
+				var min = int.MaxValue;
 
                 foreach(var neighbour in current.GetNeighbours()) {
 					if (!neighbour.IsInsideBox(_board.Count, _board[0].Count)) {
@@ -218,7 +218,7 @@ namespace IdaStar
 					threshold = 0;
 				}
                 else {
-					threshold++;
+					threshold = newThreshold;
 				}
 			}
 		}

labyrinth.txt

@@ -1,7 +1,7 @@
-#### ###
-#S    #
-##### ##
-         
-## ####  #
-#  #     #
-  ##F####
+####.###..
+#S....#...
+#####.##..
+..........
+##.####..#
+#..#.....#
+..##F####.