Path类对路径字符串的操作

[TestMethod]
public void testPath()
{
string fullPath= @"c:\dir1\dir1.2\abc.txt.exe";
string dir = @"c:\dir1\dir1.2";
string file = "abc.txt.exe";
string ext = ".exe";
string root = "c:\\";
string t;
t = Path.GetDirectoryName(fullPath);
Assert.AreEqual(dir, t);
Assert.IsTrue(!t.EndsWith("\\"));
t = Path.GetFileName(fullPath);
Assert.AreEqual(file, t);
t = Path.GetExtension(file);
Assert.AreEqual(ext, t);
t = Path.GetPathRoot(fullPath);
Assert.AreEqual(root, t);
}