From 4a81d5d4b65e8153f93bf0845db4b5b0be3e27a5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Velimir=20=C4=90urkovi=C4=87?= <velimir.djurkovic@gmail.com>
Date: Tue, 4 Feb 2025 02:38:50 +0100
Subject: [PATCH] feat: add csharp solution to lc problem: No.0009

---
 .../0009.Palindrome Number/README.md          | 21 +++++++++++++++++++
 .../0009.Palindrome Number/README_EN.md       | 21 +++++++++++++++++++
 .../0009.Palindrome Number/Solution.cs        | 16 ++++++++++++++
 3 files changed, 58 insertions(+)
 create mode 100644 solution/0000-0099/0009.Palindrome Number/Solution.cs

diff --git a/solution/0000-0099/0009.Palindrome Number/README.md b/solution/0000-0099/0009.Palindrome Number/README.md
index c0e23b1f63b38..ee1c738dee14d 100644
--- a/solution/0000-0099/0009.Palindrome Number/README.md	
+++ b/solution/0000-0099/0009.Palindrome Number/README.md	
@@ -210,6 +210,27 @@ var isPalindrome = function (x) {
 };
 ```
 
+#### C#
+
+```cs
+public class Solution
+{
+    public bool IsPalindrome(int x)
+    {
+        if (x < 0 || (x > 0 && x % 10 == 0))
+        {
+            return false;
+        }
+        int y = 0;
+        for (; y < x; x /= 10)
+        {
+            y = y * 10 + x % 10;
+        }
+        return x == y || x == y / 10;
+    }
+}
+```
+
 #### PHP
 
 ```php
diff --git a/solution/0000-0099/0009.Palindrome Number/README_EN.md b/solution/0000-0099/0009.Palindrome Number/README_EN.md
index 0392466009818..5616eee00755d 100644
--- a/solution/0000-0099/0009.Palindrome Number/README_EN.md	
+++ b/solution/0000-0099/0009.Palindrome Number/README_EN.md	
@@ -202,6 +202,27 @@ var isPalindrome = function (x) {
 };
 ```
 
+#### C#
+
+```cs
+public class Solution
+{
+    public bool IsPalindrome(int x)
+    {
+        if (x < 0 || (x > 0 && x % 10 == 0))
+        {
+            return false;
+        }
+        int y = 0;
+        for (; y < x; x /= 10)
+        {
+            y = y * 10 + x % 10;
+        }
+        return x == y || x == y / 10;
+    }
+}
+```
+
 #### PHP
 
 ```php
diff --git a/solution/0000-0099/0009.Palindrome Number/Solution.cs b/solution/0000-0099/0009.Palindrome Number/Solution.cs
new file mode 100644
index 0000000000000..b58946514c161
--- /dev/null
+++ b/solution/0000-0099/0009.Palindrome Number/Solution.cs	
@@ -0,0 +1,16 @@
+public class Solution
+{
+    public bool IsPalindrome(int x)
+    {
+        if (x < 0 || (x > 0 && x % 10 == 0))
+        {
+            return false;
+        }
+        int y = 0;
+        for (; y < x; x /= 10)
+        {
+            y = y * 10 + x % 10;
+        }
+        return x == y || x == y / 10;
+    }
+}
\ No newline at end of file