Created Mine Map and ReactivePlanner

ConsoleApp/Maps/MapExtensions.cs

@@ -0,0 +1,20 @@
+namespace ConsoleApp.Maps
+{
+    public static class MapExtensions
+    {
+        public static void Fill2DArray<T>(this T[,] arr, T value)
+        {
+            int numRows = arr.GetLength(0);
+            int numCols = arr.GetLength(1);
+
+            for (int i = 0; i < numRows; ++i)
+            {
+                for (int j = 0; j < numCols; ++j)
+                {
+                    arr[i, j] = value;
+                }
+            }
+        }
+        
+    }
+}