我将此用于console + net 6

Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().Location)

可以使用“解决方案资源管理器”在项目中创建文件夹名称为“资源”，然后可以在“资源”中粘贴文件。

private void Form1_Load(object sender, EventArgs e) {
    string appName = Environment.CurrentDirectory;
    int l = appName.Length;
    int h = appName.LastIndexOf("bin");
    string ll = appName.Remove(h);                
    string g = ll + "Resources\\sample.txt";
    System.Diagnostics.Process.Start(g);
}

AppDomain.CurrentDomain.BaseDirectory

将解决问题，以引用第三方参考文件与安装包。

为什么不是p/invoke方法呢?

    using System;
    using System.IO;
    using System.Runtime.InteropServices;
    using System.Text;
    public class AppInfo
    {
            [DllImport("kernel32.dll", CharSet = CharSet.Auto, ExactSpelling = false)]
            private static extern int GetModuleFileName(HandleRef hModule, StringBuilder buffer, int length);
            private static HandleRef NullHandleRef = new HandleRef(null, IntPtr.Zero);
            public static string StartupPath
            {
                get
                {
                    StringBuilder stringBuilder = new StringBuilder(260);
                    GetModuleFileName(NullHandleRef, stringBuilder, stringBuilder.Capacity);
                    return Path.GetDirectoryName(stringBuilder.ToString());
                }
            }
    }

您可以像使用应用程序一样使用它。StartupPath:

    Console.WriteLine("The path to this executable is: " + AppInfo.StartupPath + "\\" + System.Diagnostics.Process.GetCurrentProcess().ProcessName + ".exe");

您有两个选项来查找应用程序的目录，具体选择哪个取决于您的目的。

// to get the location the assembly is executing from
//(not necessarily where the it normally resides on disk)
// in the case of the using shadow copies, for instance in NUnit tests, 
// this will be in a temp directory.
string path = System.Reflection.Assembly.GetExecutingAssembly().Location;

//To get the location the assembly normally resides on disk or the install directory
string path = System.Reflection.Assembly.GetExecutingAssembly().CodeBase;

//once you have the path you get the directory with:
var directory = System.IO.Path.GetDirectoryName(path);

你可以用这个代替。

System.Environment.CurrentDirectory