diff --git a/problems/0112.路径总和.md b/problems/0112.路径总和.md
index be03f719..f1ce7637 100644
--- a/problems/0112.路径总和.md
+++ b/problems/0112.路径总和.md
@@ -1511,6 +1511,17 @@ impl Solution {
     }
 }
 
+```
+### C#
+```C#
+// 0112.路径总和
+// 递归 
+public bool HasPathSum(TreeNode root, int targetSum)
+{
+    if (root == null) return false;
+    if (root.left == null && root.right == null && targetSum == root.val) return true;
+    return HasPathSum(root.left, targetSum - root.val) || HasPathSum(root.right, targetSum - root.val);
+}
 ```
 
 <p align="center">