I think its done

ConsoleApp/Maps/Cell.cs

@@ -4,20 +4,23 @@ namespace ConsoleApp.Maps
 {
     public enum Coverage
     {
-        Uncoverd,
+        //Order here matters these are cast to ints for the heuristic algorithm
+        Uncovered,
         Covered
     }
-    public struct Cell : ICell
+    public class Cell : ICell
     {
         public int X { get; }
         public int Y { get; }
         public Coverage Coverage { get; set; }
+        public bool Blocked { get; set; }
         
         public Cell(int x, int y)
         {
             X = x;
             Y = y;
-            Coverage = Coverage.Uncoverd;
+            Coverage = Coverage.Uncovered;
+            Blocked = false;
         }