Merge pull request youngyangyang04#2397 from eeee0717/master

Update0406.根据身高重建队列，添加C#

Author: youngyangyang04

problems/0005.最长回文子串.md

@@ -618,7 +618,7 @@ char * longestPalindrome(char * s){
 ### C#：
 
 動態規則：
-```c#
+```csharp
 public class Solution {
 
     public string LongestPalindrome(string s) {
@@ -648,7 +648,7 @@ public class Solution {
 ```
 
 雙指針：
-```C#
+```csharp
 public class Solution {
     int maxlenth = 0;
     int left = 0;

problems/0017.电话号码的字母组合.md

@@ -733,7 +733,7 @@ def backtracking(result, letter_map, digits, path, index)
 end
 ```
 ### C#
-```C#
+```csharp
 public class Solution
 {
     public IList<string> res = new List<string>();

problems/0024.两两交换链表中的节点.md

@@ -462,7 +462,7 @@ impl Solution {
 ```
 
 ### C#
-```C#
+```csharp
 // 虚拟头结点
 public ListNode SwapPairs(ListNode head)
 {

problems/0028.实现strStr.md

@@ -1359,7 +1359,7 @@ impl Solution {
 ```
 
 >前缀表统一不减一
-```C#
+```csharp
 public int StrStr(string haystack, string needle)
 {
     if (string.IsNullOrEmpty(needle))

problems/0034.在排序数组中查找元素的第一个和最后一个位置.md

@@ -331,7 +331,7 @@ class Solution {
 
 ### C#
 
-```c#
+```csharp
 public int[] SearchRange(int[] nums, int target) {
 
 	var leftBorder = GetLeftBorder(nums, target);

problems/0056.合并区间.md

@@ -336,6 +336,32 @@ impl Solution {
     }
 }
 ```
+### C#
+```csharp
+public class Solution
+{
+    public int[][] Merge(int[][] intervals)
+    {
+        if (intervals.Length == 0)
+            return intervals;
+        Array.Sort(intervals, (a, b) => a[0] - b[0]);
+        List<List<int>> res = new List<List<int>>();
+        res.Add(intervals[0].ToList());
+        for (int i = 1; i < intervals.Length; i++)
+        {
+            if (res[res.Count - 1][1] >= intervals[i][0])
+            {
+                res[res.Count - 1][1] = Math.Max(res[res.Count - 1][1], intervals[i][1]);
+            }
+            else
+            {
+                res.Add(intervals[i].ToList());
+            }
+        }
+        return res.Select(x => x.ToArray()).ToArray();
+    }
+}
+```
 
 <p align="center">
 <a href="https://programmercarl.com/other/kstar.html" target="_blank">

problems/0062.不同路径.md

@@ -537,7 +537,7 @@ object Solution {
 
 ### c#
 
-```c#
+```csharp
 public class Solution
 {
     public int UniquePaths(int m, int n)

problems/0070.爬楼梯.md

@@ -468,7 +468,7 @@ object Solution {
 
 ### C#
 
-```c#
+```csharp
 public class Solution {
     public int ClimbStairs(int n) {
         if(n<=2) return n;

problems/0077.组合.md

@@ -793,7 +793,7 @@ end
 
 ```
 ### C#
-```C#
+```csharp
 // 暴力
 public class Solution
 {

problems/0090.子集II.md

@@ -641,7 +641,7 @@ object Solution {
 }
 ```
 ### C#
-```c#
+```csharp
 public class Solution
 {
     public IList<IList<int>> res = new List<IList<int>>();