Update0406.根据审稿重建队列，添加C#

problems/0406.根据身高重建队列.md

@@ -396,6 +396,29 @@ object Solution {
   }
 }
 ```
+### C#
+```csharp
+public class Solution
+{
+    public int[][] ReconstructQueue(int[][] people)
+    {
+        Array.Sort(people, (a, b) =>
+        {
+            if (a[0] == b[0])
+            {
+                return a[1] - b[1];
+            }
+            return b[0] - a[0];
+        });
+        var res = new List<int[]>();
+        for (int i = 0; i < people.Length; i++)
+        {
+            res.Insert(people[i][1], people[i]);
+        }
+        return res.ToArray();
+    }
+}
+```
 
 
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