refactor(csharp): replace escaped quotes in interpolated strings with raw string literals for clarity

DataStructures/AATree/AATree.cs

@@ -213,7 +213,7 @@ private AaTreeNode<TKey> Add(TKey key, AaTreeNode<TKey>? node)
         }
         else
         {
-            throw new ArgumentException($"Key \"{key}\" already in tree!", nameof(key));
+            throw new ArgumentException($"""Key "{key}" already in tree!""", nameof(key));
         }
 
         return Split(Skew(node))!;

DataStructures/AVLTree/AVLTree.cs

@@ -360,8 +360,7 @@ private AvlTreeNode<TKey> Add(AvlTreeNode<TKey> node, TKey key)
         }
         else
         {
-            throw new ArgumentException(
-                $"Key \"{key}\" already exists in AVL tree.");
+            throw new ArgumentException($"""Key "{key}" already exists in AVL tree.""");
         }
 
         // Check all of the new node's ancestors for inbalance and perform
@@ -382,7 +381,7 @@ private AvlTreeNode<TKey> Add(AvlTreeNode<TKey> node, TKey key)
         if (node == null)
         {
             throw new KeyNotFoundException(
-                $"Key \"{key}\" is not in the AVL tree.");
+                $"""Key "{key}" is not in the AVL tree.""");
         }
 
         // Normal binary search tree removal

DataStructures/BinarySearchTree/BinarySearchTree.cs

@@ -201,7 +201,7 @@ private void Add(BinarySearchTreeNode<TKey> node, TKey key)
         // Key is already in tree.
         else
         {
-            throw new ArgumentException($"Key \"{key}\" already exists in tree!");
+            throw new ArgumentException($"""Key "{key}" already exists in tree!""");
         }
     }
 

DataStructures/RedBlackTree/RedBlackTree.cs

@@ -101,7 +101,7 @@ public void Add(TKey key)
         {
             addCase = GetAddCase(node);
 
-            switch(addCase)
+            switch (addCase)
             {
                 case 1:
                     break;
@@ -339,7 +339,7 @@ private RedBlackTreeNode<TKey> Add(RedBlackTreeNode<TKey> node, TKey key)
             }
             else
             {
-                throw new ArgumentException($"Key \"{key}\" already exists in tree!");
+                throw new ArgumentException($"""Key "{key}" already exists in tree!""");
             }
         }