方法1:
using System.IO;
if (File.Exists("d:\a.exe"))
{
//do something
}
if (Directory.Exists("d:\abc\"))
{
//do something
}
方法2:
DirectoryInfo aPath = new DirectoryInfo(PathName);
if (aPath.Exists)
{
//do something
}
FileInfo aFile = new FileInfo(PathName);
{
//do something
}
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