Update 0452.用最少数量的箭引爆气球，添加C#

problems/0452.用最少数量的箭引爆气球.md

@@ -332,6 +332,24 @@ object Solution {
   }
 }
 ```
+### C#
+```csharp
+public class Solution
+{
+    public int FindMinArrowShots(int[][] points)
+    {
+        if (points.Length == 0) return 0;
+        Array.Sort(points, (a, b) => a[0].CompareTo(b[0]));
+        int count = 1;
+        for (int i = 1; i < points.Length; i++)
+        {
+            if (points[i][0] > points[i - 1][1]) count++;
+            else points[i][1] = Math.Min(points[i][1], points[i - 1][1]);
+        }
+        return count;
+    }
+}
+```
 
 <p align="center">
 <a href="https://programmercarl.com/other/kstar.html" target="_blank">