Declared all nodes to be internal

C#/Datastructures/DoublyLinkedList/DoublyLinkedListNode.cs

@@ -4,7 +4,7 @@ namespace C_.Datastructures.DoublyLinkedList
 {
     internal class DoublyLinkedListNode<T> : UndirectedNode<T, DoublyLinkedListNode<T>>
     {//Inherits from Node
-        public DoublyLinkedListNode<T>? Prev { get; set; } = default;
+        internal DoublyLinkedListNode<T>? Prev { get; set; } = default;
 
         public static DoublyLinkedListNode<T> Create(T? value, DoublyLinkedListNode<T>? next, DoublyLinkedListNode<T>? prev)
         {

C#/Datastructures/Generic/DirectedNode.cs

@@ -9,7 +9,7 @@ namespace C_.Datastructures.Generic
     abstract internal class DirectedNode<T, NodeType>
     {
         public T? Value { get; set; } = default;
-        public NodeType? Left { get; set; } = default;
-        public NodeType? Right { get; set; } = default;
+        internal NodeType? Left { get; set; } = default;
+        internal NodeType? Right { get; set; } = default;
     }
 }

C#/Datastructures/Generic/UndirectedNode.cs

@@ -5,6 +5,6 @@ namespace C_.Datastructures.Generic
     abstract internal class UndirectedNode<T, NodeType>
     {//Generic Node type that every other type inherits from
         public T? Value { get; set; } = default;
-        public NodeType? Next { get; set; } = default;
+        internal NodeType? Next { get; set; } = default;
     }
 }