From 8865ed851aeb14a7e768c9fa5d7ef0c2a110c56f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=A1=9C=E5=B0=8F=E8=B7=AF=E4=B8=83=E8=91=89?=
 <20304773@qq.com>
Date: Fri, 22 Jul 2022 15:36:23 +0800
Subject: [PATCH] =?UTF-8?q?Update=200941.=E6=9C=89=E6=95=88=E7=9A=84?=
 =?UTF-8?q?=E5=B1=B1=E8=84=89=E6=95=B0=E7=BB=84.md?=
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---
 problems/0941.有效的山脉数组.md | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/problems/0941.有效的山脉数组.md b/problems/0941.有效的山脉数组.md
index 310dd35a..fb7935a8 100644
--- a/problems/0941.有效的山脉数组.md
+++ b/problems/0941.有效的山脉数组.md
@@ -177,7 +177,24 @@ function validMountainArray(arr: number[]): boolean {
 };
 ```
 
+## C#
 
+```csharp
+public class Solution {
+    public bool ValidMountainArray(int[] arr) {
+        if (arr.Length < 3) return false;
+
+        int left = 0;
+        int right = arr.Length - 1;
+
+        while (left + 1< arr.Length && arr[left] < arr[left + 1]) left ++;
+        while (right > 0 && arr[right] < arr[right - 1]) right --;
+        if (left == right && left != 0 && right != arr.Length - 1) return true;
+	
+        return false;
+    }
+}
+```
 
 
 -----------------------