C#检查文件目的地是否有效

using System;
using System.IO;

class Program
{
    static void Main(string[] args)
    {
        string filePath = "C:\\example.txt";
        string directoryPath = "C:\\example_directory";

        if (File.Exists(filePath))
        {
            Console.WriteLine("文件存在：" + filePath);
        }
        else
        {
            Console.WriteLine("文件不存在：" + filePath);
        }

        if (Directory.Exists(directoryPath))
        {
            Console.WriteLine("目录存在：" + directoryPath);
        }
        else
        {
            Console.WriteLine("目录不存在：" + directoryPath);
        }

        string fullPath = Path.GetFullPath(filePath);
        Console.WriteLine("文件完整路径：" + fullPath);
    }
}