From 5ac7f6438110a91529b22fc45fb2a52d732cd076 Mon Sep 17 00:00:00 2001
From: xiaoyu2018 <861900161@qq.com>
Date: Sun, 25 Sep 2022 16:02:41 +0800
Subject: [PATCH] =?UTF-8?q?=E6=B7=BB=E5=8A=A00509=E6=96=90=E6=B3=A2?=
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---
 problems/0070.爬楼梯.md | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/problems/0070.爬楼梯.md b/problems/0070.爬楼梯.md
index 0a6acf7f..903e8d58 100644
--- a/problems/0070.爬楼梯.md
+++ b/problems/0070.爬楼梯.md
@@ -425,5 +425,25 @@ object Solution {
 }
 ```
 
+### C#
+
+```c#
+public class Solution {
+    public int ClimbStairs(int n) {
+        if(n<=2) return n;
+        int[] dp = new int[2] { 1, 2 };
+        for (int i = 3; i <= n; i++)
+        {
+            int temp = dp[0] + dp[1];
+            dp[0] = dp[1];
+            dp[1] = temp;
+        }
+        return dp[1];
+    }
+}
+```
+
+
+
 -----------------------
 <div align="center"><img src=https://code-thinking.cdn.bcebos.com/pics/01二维码一.jpg width=500> </img></div>