From 9869450bfef9870400106bdc0170890461ba2943 Mon Sep 17 00:00:00 2001
From: takumis <takumis@example.com>
Date: Tue, 4 Aug 2026 23:51:48 +0800
Subject: [PATCH] feat: add c# solution for lc No.3731

---
 .gitignore                                                | 1 +
 solution/3700-3799/3731.Find Missing Elements/Solution.cs | 8 ++++++++
 2 files changed, 9 insertions(+)
 create mode 100644 solution/3700-3799/3731.Find Missing Elements/Solution.cs

diff --git a/.gitignore b/.gitignore
index 3fd25e0ba7ab1..80fd462d23017 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,6 +3,7 @@
 .vscode
 .temp
 .vitepress
+.vs/
 *.iml
 __pycache__
 /node_modules
diff --git a/solution/3700-3799/3731.Find Missing Elements/Solution.cs b/solution/3700-3799/3731.Find Missing Elements/Solution.cs
new file mode 100644
index 0000000000000..77bafaf56cf55
--- /dev/null
+++ b/solution/3700-3799/3731.Find Missing Elements/Solution.cs	
@@ -0,0 +1,8 @@
+using System;
+
+public class Solution
+{
+	public Solution()
+	{
+	}
+}