Updated Doubly Linked List to allow for null values to be added

C#/Datastructures/DoublyLinkedList/DoublyLinkedList.cs

@@ -12,7 +12,7 @@
             return new DoublyLinkedList<T>();
         }
 
-        public static DoublyLinkedList<T> Create(T value)
+        public static DoublyLinkedList<T> Create(T? value)
         {
             //Create a new Class with a single item
             return new DoublyLinkedList<T>()
@@ -67,7 +67,7 @@
                 node!.Value = value;
             }
         }
-        public void Append(T value)
+        public void Append(T? value)
         {
             Count++;
 
@@ -84,7 +84,7 @@
             Tail = Tail.Next;
         }
 
-        public void Insert(int index, T value)
+        public void Insert(int index, T? value)
         {
             Count++;
             if (index > Count || index < 0) throw new System.Exception("Error! Index outside of Bounds");