From a9923f809d7f22b5271a09764788aa6f16fa430e Mon Sep 17 00:00:00 2001
From: eeee0717 <70054568+eeee0717@users.noreply.github.com>
Date: Mon, 20 Nov 2023 09:48:41 +0800
Subject: [PATCH 1/4] =?UTF-8?q?Update=200257.=E4=BA=8C=E5=8F=89=E6=A0=91?=
 =?UTF-8?q?=E7=9A=84=E6=89=80=E6=9C=89=E8=B7=AF=E5=BE=84=EF=BC=8C=E6=B7=BB?=
 =?UTF-8?q?=E5=8A=A0C#=E9=80=92=E5=BD=92?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 problems/0257.二叉树的所有路径.md | 37 +++++++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/problems/0257.二叉树的所有路径.md b/problems/0257.二叉树的所有路径.md
index 44c0fd85..9ba165c7 100644
--- a/problems/0257.二叉树的所有路径.md
+++ b/problems/0257.二叉树的所有路径.md
@@ -900,6 +900,43 @@ impl Solution {
     }
 }
 ```
+### C#
+```C#
+public IList<string> BinaryTreePaths(TreeNode root)
+{
+    List<int> path = new();
+    List<string> res = new();
+    if (root == null) return res;
+    Traversal(root, path, res);
+    return res;
+}
+public void Traversal(TreeNode node, List<int> path, List<string> res)
+{
+    path.Add(node.val);
+    if (node.left == null && node.right == null)
+    {
+        string sPath = "";
+        for (int i = 0; i < path.Count - 1; i++)
+        {
+            sPath += path[i].ToString();
+            sPath += "->";
+        }
+        sPath += path[path.Count - 1].ToString();
+        res.Add(sPath);
+        return;
+    }
+    if (node.left != null)
+    {
+        Traversal(node.left, path, res);
+        path.RemoveAt(path.Count-1);
+    }
+    if (node.right != null)
+    {
+        Traversal(node.right, path, res);
+        path.RemoveAt(path.Count-1);
+    }
+}
+```
 
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From 34de1fd8b0fde25caef3626bf6a848f080607aed Mon Sep 17 00:00:00 2001
From: eeee0717 <70054568+eeee0717@users.noreply.github.com>
Date: Tue, 21 Nov 2023 09:07:56 +0800
Subject: [PATCH 2/4] =?UTF-8?q?Update=20404.=E5=B7=A6=E5=8F=B6=E5=AD=90?=
 =?UTF-8?q?=E4=B9=8B=E5=92=8C=EF=BC=8C=E6=B7=BB=E5=8A=A0C#=E9=80=92?=
 =?UTF-8?q?=E5=BD=92=E7=89=88?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 problems/0404.左叶子之和.md | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/problems/0404.左叶子之和.md b/problems/0404.左叶子之和.md
index c1ad602d..6dfcc886 100644
--- a/problems/0404.左叶子之和.md
+++ b/problems/0404.左叶子之和.md
@@ -651,6 +651,23 @@ impl Solution {
     }
 }
 ```
+### C#
+```C#
+// 递归
+public int SumOfLeftLeaves(TreeNode root)
+{
+    if (root == null) return 0;
+
+    int leftValue = SumOfLeftLeaves(root.left);
+    if (root.left != null && root.left.left == null && root.left.right == null)
+    {
+        leftValue += root.left.val;
+    }
+    int rightValue = SumOfLeftLeaves(root.right);
+    return leftValue + rightValue;
+
+}
+```
 
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From b1d56c8cffe8fb25fc9bbf7d8f5aa768491bb68d Mon Sep 17 00:00:00 2001
From: eeee0717 <70054568+eeee0717@users.noreply.github.com>
Date: Wed, 22 Nov 2023 10:02:57 +0800
Subject: [PATCH 3/4] =?UTF-8?q?Update=200513.=E6=89=BE=E6=A0=91=E5=B7=A6?=
 =?UTF-8?q?=E4=B8=8B=E6=96=B9=E7=9A=84=E5=80=BC=EF=BC=8C=E6=B7=BB=E5=8A=A0?=
 =?UTF-8?q?C#=E9=80=92=E5=BD=92=E7=89=88?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 problems/0513.找树左下角的值.md | 32 ++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/problems/0513.找树左下角的值.md b/problems/0513.找树左下角的值.md
index 7ef934cc..0e2f4266 100644
--- a/problems/0513.找树左下角的值.md
+++ b/problems/0513.找树左下角的值.md
@@ -684,6 +684,38 @@ impl Solution {
     }
 }
 ```
+### C#
+```C#
+//递归
+int maxDepth = -1;
+int res = 0;
+public int FindBottomLeftValue(TreeNode root)
+{
+    Traversal(root, 0);
+    return res;
+}
+public void Traversal(TreeNode root, int depth)
+{
+    if (root.left == null && root.right == null)
+    {
+        if (depth > maxDepth)
+        {
+            maxDepth = depth;
+            res = root.val;
+        }
+        return;
+    }
+    if (root.left != null)
+    {
+        Traversal(root.left, depth + 1);
+    }
+    if (root.right != null)
+    {
+        Traversal(root.right, depth + 1);
+    }
+    return;
+}
+```
 
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From 0d993075669743879b59c8a549783604dbbb7b2f Mon Sep 17 00:00:00 2001
From: eeee0717 <70054568+eeee0717@users.noreply.github.com>
Date: Thu, 23 Nov 2023 09:38:13 +0800
Subject: [PATCH 4/4] =?UTF-8?q?Update0112.=E8=B7=AF=E5=BE=84=E6=80=BB?=
 =?UTF-8?q?=E5=92=8C=EF=BC=8C=E6=B7=BB=E5=8A=A0C#=E9=80=92=E5=BD=92?=
 =?UTF-8?q?=E7=89=88?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 problems/0112.路径总和.md | 11 +++++++++++
 1 file changed, 11 insertions(+)

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">