feat: 增加 IDispose 接口保证释放文件句柄

binding/csharp/IP2Region.Net.Test/SearcherTest.cs

@@ -78,6 +78,8 @@ public class SearcherTest
 
         searcher.Search("58.251.27.201");
         Assert.Equal(3, searcher.IoCount);
+
+        searcher.Dispose();
     }
 
     [Fact]
@@ -89,6 +91,8 @@ public class SearcherTest
 
         searcher.Search("58.251.27.201");
         Assert.Equal(2, searcher.IoCount);
+
+        searcher.Dispose();
     }
 
     [Fact]
@@ -100,6 +104,8 @@ public class SearcherTest
 
         searcher.Search("58.251.27.201");
         Assert.Equal(0, searcher.IoCount);
+
+        searcher.Dispose();
     }
 
     [Theory]

binding/csharp/IP2Region.Net/Abstractions/ISearcher.cs

@@ -12,7 +12,7 @@ namespace IP2Region.Net.Abstractions;
 /// <summary>
 /// IP 转化为地理位置搜索器接口
 /// </summary>
-public interface ISearcher
+public interface ISearcher : IDisposable
 {
     /// <summary>
     /// 搜索方法

binding/csharp/IP2Region.Net/Internal/ContentCacheStrategy.cs

@@ -14,7 +14,14 @@ class ContentCacheStrategy : FileCacheStrategy
     public ContentCacheStrategy(string xdbPath) : base(xdbPath)
     {
         _cacheData = base.GetData(0, (int)XdbFileStream.Length);
+        XdbFileStream.Close();
+        XdbFileStream.Dispose();
     }
 
     public override ReadOnlyMemory<byte> GetData(long offset, int length) => _cacheData.Slice((int)offset, length);
+
+    protected override void Dispose(bool disposing)
+    {
+        base.Dispose(false);
+    }
 }

binding/csharp/IP2Region.Net/Internal/FileCacheStrategy.cs

@@ -60,4 +60,26 @@ class FileCacheStrategy(string xdbPath) : ICacheStrategy
             ArrayPool<byte>.Shared.Return(buffer);
         }
     }
+
+    /// <summary>
+    /// 释放文件句柄
+    /// </summary>
+    /// <param name="disposing"></param>
+    protected virtual void Dispose(bool disposing)
+    {
+        if (disposing)
+        {
+            XdbFileStream.Close();
+            XdbFileStream.Dispose();
+        }
+    }
+
+    /// <summary>
+    /// <inheritdoc/>
+    /// </summary>
+    public void Dispose()
+    {
+        Dispose(true);
+        GC.SuppressFinalize(this);
+    }
 }

binding/csharp/IP2Region.Net/Internal/ICacheStrategy.cs

@@ -7,7 +7,7 @@
 
 namespace IP2Region.Net.Internal;
 
-internal interface ICacheStrategy
+internal interface ICacheStrategy : IDisposable
 {
     int IoCount { get; }
 

binding/csharp/IP2Region.Net/XDB/Searcher.cs

@@ -147,4 +147,13 @@ public class Searcher(CachePolicy cachePolicy, string xdbPath) : ISearcher
         }
         return ret;
     }
+
+    /// <summary>
+    /// <inheritdoc/>
+    /// </summary>
+    public void Dispose()
+    {
+        _cacheStrategy.Dispose();
+        GC.SuppressFinalize(this);
+    }
 }