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);
}

这些方法在特殊情况下都不起作用，比如使用到exe的符号链接，它们将返回链接的位置，而不是实际的exe。

所以可以使用QueryFullProcessImageName来解决这个问题:

using System;
using System.IO;
using System.Runtime.InteropServices;
using System.Text;
using System.Diagnostics;

internal static class NativeMethods
{
    [DllImport("kernel32.dll", SetLastError = true)]
    internal static extern bool QueryFullProcessImageName([In]IntPtr hProcess, [In]int dwFlags, [Out]StringBuilder lpExeName, ref int lpdwSize);

    [DllImport("kernel32.dll", SetLastError = true)]
    internal static extern IntPtr OpenProcess(
        UInt32 dwDesiredAccess,
        [MarshalAs(UnmanagedType.Bool)]
        Boolean bInheritHandle,
        Int32 dwProcessId
    );
}

public static class utils
{

    private const UInt32 PROCESS_QUERY_INFORMATION = 0x400;
    private const UInt32 PROCESS_VM_READ = 0x010;

    public static string getfolder()
    {
        Int32 pid = Process.GetCurrentProcess().Id;
        int capacity = 2000;
        StringBuilder sb = new StringBuilder(capacity);
        IntPtr proc;

        if ((proc = NativeMethods.OpenProcess(PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, false, pid)) == IntPtr.Zero)
            return "";

        NativeMethods.QueryFullProcessImageName(proc, 0, sb, ref capacity);

        string fullPath = sb.ToString(0, capacity);

        return Path.GetDirectoryName(fullPath) + @"\";
    }
}

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");

如果你正在寻找一种与。net Core兼容的方法，请使用

System.AppContext.BaseDirectory

这是在。net Framework 4.6和。net Core 1.0(和。net Standard 1.3)中引入的。看到:AppContext。BaseDirectory财产。

根据这一页，

这是。net Core中AppDomain.CurrentDomain.BaseDirectory的首选替代品

技术和陷阱一直在变化。下面假设你在linux上运行。net 6控制台应用程序(在win/mac上，结果将遵循类似的模式，只需将/usr/share/和/home/username/替换为操作系统的标准位置)。

演示:

Console.WriteLine("Path.GetDirectoryName(Process.GetCurrentProcess()?.MainModule?.FileName) = " + Path.GetDirectoryName(Process.GetCurrentProcess()?.MainModule?.FileName));
Console.WriteLine("Path.GetDirectoryName(Environment.ProcessPath)                           = " + Path.GetDirectoryName(Environment.ProcessPath));
Console.WriteLine("Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location)          = " + Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location));
Console.WriteLine("typeof(SomeType).Assembly.Location                                       = " + typeof(SomeType).Assembly.Location);
Console.WriteLine("Path.GetDirectoryName(Environment.GetCommandLineArgs()[0])               = " + Path.GetDirectoryName(Environment.GetCommandLineArgs()[0]));
Console.WriteLine("AppDomain.CurrentDomain.BaseDirectory                                    = " + AppDomain.CurrentDomain.BaseDirectory);
Console.WriteLine("System.AppContext.BaseDirectory                                          = " + System.AppContext.BaseDirectory);

结果:

Path.GetDirectoryName(Process.GetCurrentProcess()?.MainModule?.FileName) = /usr/share/dotnet
Path.GetDirectoryName(Environment.ProcessPath)                           = /usr/share/dotnet
Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location)          = /home/username/myproject/bin/Debug/net6.0
typeof(SomeType).Assembly.Location                                       = /home/username/myproject/bin/Debug/net6.0
Path.GetDirectoryName(Environment.GetCommandLineArgs()[0])               = /home/username/myproject/bin/Debug/net6.0
AppDomain.CurrentDomain.BaseDirectory                                    = /home/username/myproject/bin/Debug/net6.0/
System.AppContext.BaseDirectory                                          = /home/username/myproject/bin/Debug/net6.0/

每种方法都有其优点和缺点-请参阅其他答案以了解在哪种情况下使用哪种方法。

我用dotnet myapp运行我的.NET 6控制台应用程序，所以对我来说(可靠的)工作是:

typeof(SomeType).Assembly.Location
// or
Path.GetDirectoryName(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);
}