Re-Written Delete method on Binary Tree

C#/Datastructures/BinaryTree/Tree.cs

@@ -78,31 +78,38 @@ namespace C_.Datastructures.BinaryTree
             //Delete Item (replace) and replace pointers to retain integrity of tree
 
             TreeNode<T>? node = deletionStack.Pop();
-            TreeNode<T>? parent = deletionStack.Pop();
 
             //stack to store the items leading up to the value that we will use to replace the node
             Stack<TreeNode<T>>? replacementStack = Min(node!.Right);
-            if (replacementStack != default)
-            {//If there are values to the right
+            
+            if (replacementStack == default)
+            {//Nothing to the right of the value we are deleting
+                if (deletionStack.Peek() != default)
+                {//Parent adopts left hand side of node if present
+                    deletionStack.Pop()!.Left = node.Left;
+                }
+
+                if (node.Left != default)
+                {//Node adopts left value if no lower value to the right
+                    node.Value = node.Left!.Value;
+                    node.Left = node.Left.Left;
+                }
+            }
+            else
+            {//Replace the value + reorder nodes
+                node.Value = replacementStack.Peek()!.Value;
                 TreeNode<T>? replacementNode = replacementStack.Pop();
 
-                node.Value = replacementNode!.Value;
-
-                //Remove the node that we have taken the value from
-                if (replacementStack.Peek() != default)
-                {//If the parent is not the node that we replaced
-                    replacementStack.Pop()!.Left = replacementNode.Right;
-                }else{//If the parent is the node what we replaced
-                    node.Right = replacementNode.Right;
-                }
-            }else{
-                //Parent's relation needs to be set to null as there are no greater values
-                if (node.Value!.CompareTo(parent!.Value) < 0)
-                {//Item being deleted is the left child
-                    parent.Left = default;
-                }else{
-                    //Item being deleted is the right value
-                    parent.Right = default;
+                switch (replacementStack.GetCount())
+                {//Determine what to do based on number of items in replacement stack
+                    case 1:
+                        node.Right = replacementNode!.Right;
+                        break;
+                    case >=2:
+                        replacementStack.Peek()!.Left = replacementNode!.Right;
+                        break;
+                    default:
+                        break;
                 }
             }
             Count--;

C#/Program.cs

@@ -112,15 +112,17 @@ Console.WriteLine("Hello, World!");
 
 Tree<int> tree = new Tree<int>();
 
-tree.Add(5);
-tree.Add(4);
+tree.Add(10);
+tree.Add(8);
+tree.Add(6);
 tree.Add(3);
+tree.Add(4);
+tree.Add(5);
 tree.Add(2);
-tree.Add(1);
 tree.Add(0);
 
 
-var x = tree.Delete(3);
+var x = tree.Delete(10);
 //tree.Delete(5);
 
 var l = tree.Inorder(null);