diff --git a/Falcon.SugarApi.Windows/FileExtend.cs b/Falcon.SugarApi.Windows/FileExtend.cs
new file mode 100644
index 0000000..b67047c
--- /dev/null
+++ b/Falcon.SugarApi.Windows/FileExtend.cs
@@ -0,0 +1,36 @@
+using System.Runtime.InteropServices;
+
+namespace Falcon.SugarApi.Windows
+{
+ ///
+ /// 文件操作扩展
+ ///
+ public static class FileExtend
+ {
+ [DllImport("kernel32.dll")]
+ private static extern IntPtr _lopen(string lpPathName,int iReadWrite);
+
+ [DllImport("kernel32.dll")]
+ private static extern bool CloseHandle(IntPtr hObject);
+
+ ///
+ /// 判断文件是否打开,并可选是否关闭
+ ///
+ /// 文件路径
+ /// True关闭文件,不关闭。默认不关闭
+ /// True文件打开,False文件没有打开
+ public static bool IsOpen(this string path,bool close = false) {
+ if(!File.Exists(path)) {
+ return false;
+ }
+ var handle = _lopen(path,2|0x40);
+ if(handle==new IntPtr(-1)) {
+ return true;
+ }
+ if(close) {
+ CloseHandle(handle);
+ }
+ return false;
+ }
+ }
+}