From 5b5a05ada59333813312ebfe2f3f258cb9ea791f Mon Sep 17 00:00:00 2001
From: eeee0717 <chentao020717Work@outlook.com>
Date: Mon, 18 Dec 2023 09:23:42 +0800
Subject: [PATCH 1/2] =?UTF-8?q?Update0078.=E5=AD=90=E9=9B=86=EF=BC=8C?=
 =?UTF-8?q?=E6=B7=BB=E5=8A=A0C#?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 problems/0078.子集.md | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/problems/0078.子集.md b/problems/0078.子集.md
index 5f3654de..06547e3d 100644
--- a/problems/0078.子集.md
+++ b/problems/0078.子集.md
@@ -443,6 +443,27 @@ object Solution {
   }
 }
 ```
+### C#
+```csharp
+public class Solution {
+    public IList<IList<int>> res = new List<IList<int>>();
+    public IList<int> path = new List<int>();
+    public IList<IList<int>> Subsets(int[] nums) {
+        BackTracking(nums, 0);
+        return res;
+    }
+    public void BackTracking(int[] nums, int start){
+        res.Add(new List<int>(path));
+        if(start > nums.Length) return;
+        for (int i = start; i < nums.Length; i++)
+        {
+            path.Add(nums[i]);
+            BackTracking(nums, i + 1);
+            path.RemoveAt(path.Count - 1);
+        }
+    }
+}
+```
 
 
 <p align="center">

From 7fdb7b17024bbfd7636dbc8100acb1687445b40b Mon Sep 17 00:00:00 2001
From: eeee0717 <chentao020717Work@outlook.com>
Date: Tue, 19 Dec 2023 09:32:06 +0800
Subject: [PATCH 2/2] =?UTF-8?q?Update0090.=E5=AD=90=E9=9B=862=EF=BC=8C?=
 =?UTF-8?q?=E6=B7=BB=E5=8A=A0C#?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 problems/0090.子集II.md | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/problems/0090.子集II.md b/problems/0090.子集II.md
index 13080cd9..9fc334a4 100644
--- a/problems/0090.子集II.md
+++ b/problems/0090.子集II.md
@@ -640,6 +640,31 @@ object Solution {
   }
 }
 ```
+### C#
+```c#
+public class Solution
+{
+    public IList<IList<int>> res = new List<IList<int>>();
+    public IList<int> path = new List<int>();
+    public IList<IList<int>> SubsetsWithDup(int[] nums)
+    {
+        Array.Sort(nums);
+        BackTracking(nums, 0);
+        return res;
+    }
+    public void BackTracking(int[] nums, int start)
+    {
+        res.Add(new List<int>(path));
+        for (int i = start; i < nums.Length; i++)
+        {
+            if (i > start && nums[i] == nums[i - 1]) continue;
+            path.Add(nums[i]);
+            BackTracking(nums, i + 1);
+            path.RemoveAt(path.Count - 1);
+        }
+    }
+}
+```
 
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