From e59dbae465c5247ff044a7d7fecd0b1cb6e22efe Mon Sep 17 00:00:00 2001
From: eeee0717 <chentao020717Work@outlook.com>
Date: Sun, 10 Dec 2023 09:25:18 +0800
Subject: [PATCH] =?UTF-8?q?update538.=E6=8A=8A=E4=BA=8C=E5=8F=89=E6=90=9C?=
 =?UTF-8?q?=E7=B4=A2=E6=A0=91=E8=BD=AC=E6=8D=A2=E4=B8=BA=E7=B4=AF=E5=8A=A0?=
 =?UTF-8?q?=E6=A0=91=EF=BC=8C=E6=B7=BB=E5=8A=A0C#?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 ...0538.把二叉搜索树转换为累加树.md | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/problems/0538.把二叉搜索树转换为累加树.md b/problems/0538.把二叉搜索树转换为累加树.md
index c403c98f..07cae1ad 100644
--- a/problems/0538.把二叉搜索树转换为累加树.md
+++ b/problems/0538.把二叉搜索树转换为累加树.md
@@ -529,6 +529,23 @@ impl Solution {
     }
 }
 ```
+### C#
+```C#
+// 递归
+public class Solution
+{
+    int pre = 0;
+    public TreeNode ConvertBST(TreeNode root)
+    {
+        if (root == null) return null;
+        ConvertBST(root.right);
+        root.val += pre;
+        pre = root.val;
+        ConvertBST(root.left);
+        return root;
+    }
+}
+```
 
 
 <p align="center">