问需要检查特定的文本文件是否处于打开状态...如果是，则需要使用c#关闭编辑器

EN

string path = @"c:\my_files\test1.txt";

FileStream stream = null;
try
{
    stream = File.Open( path, FileMode.Open, FileAccess.Read, FileShare.None);
}
catch (IOException)
{
    //the file is unavailable because it is:
    //still being written to
    //or being processed by another thread
    //or does not exist (has already been processed)
    //return true;
    Console.WriteLine("true");
}
finally
{
    if (stream != null)
        stream.Close();
}