实现提供了完整的弹幕功能，包括多行显示、不同颜色、头像支持、防重叠、椭圆形边框、透明度渐变、点击事件、字体样式设置、暂停/继续功能、过滤功能等。还包含了批处理队列处理逻辑、速率限制、错误处理和性能监控等功能。

YwxAppWpfDanMu/Utils/RateLimiter.cs

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+using System;
+using System.Diagnostics;
+
+namespace YwxAppWpfDanMu.Utils
+{
+    public class RateLimiter
+    {
+        private readonly int _maxActionsPerSecond;
+        private readonly Stopwatch _stopwatch;
+        private int _actionCount;
+        private long _lastResetTicks;
+
+        public RateLimiter(int maxActionsPerSecond)
+        {
+            if (maxActionsPerSecond <= 0)
+                throw new ArgumentOutOfRangeException(nameof(maxActionsPerSecond));
+
+            _maxActionsPerSecond = maxActionsPerSecond;
+            _stopwatch = Stopwatch.StartNew();
+            _lastResetTicks = _stopwatch.ElapsedTicks;
+        }
+
+        public bool TryAcquire()
+        {
+            long elapsedTicks = _stopwatch.ElapsedTicks;
+            long ticksPerSecond = Stopwatch.Frequency;
+
+            // 检查是否需要重置计数器
+            if (elapsedTicks - _lastResetTicks >= ticksPerSecond)
+            {
+                _actionCount = 0;
+                _lastResetTicks = elapsedTicks;
+            }
+
+            // 检查是否超过限制
+            if (_actionCount >= _maxActionsPerSecond)
+            {
+                return false;
+            }
+
+            _actionCount++;
+            return true;
+        }
+    }
+}