using System;
using System.IO;

// This will get the current WORKING directory (i.e. \bin\Debug)
string workingDirectory = Environment.CurrentDirectory;
// or: Directory.GetCurrentDirectory() gives the same result

// This will get the current PROJECT bin directory (ie ../bin/)
string projectDirectory = Directory.GetParent(workingDirectory).Parent.FullName;

// This will get the current PROJECT directory
string projectDirectory = Directory.GetParent(workingDirectory).Parent.Parent.FullName;

这个解决方案很适合我，在开发和测试和PROD服务器上使用ASP。NET MVC5通过c#:

var projectDir = Path.GetDirectoryName(AppDomain.CurrentDomain.BaseDirectory);

如果你需要项目目录中的项目配置文件使用:

$(ProjectDir)

另一种方法

string startupPath = System.IO.Directory.GetParent(@"./").FullName;

如果你想获取bin文件夹的路径

string startupPath = System.IO.Directory.GetParent(@"../").FullName;

也许有更好的方法=)

您可以尝试这两种方法中的一种。

string startupPath = System.IO.Directory.GetCurrentDirectory();

string startupPath = Environment.CurrentDirectory;

告诉我，你觉得哪个更好

.Parent.Parent.Parent.Parent.FullName Directory.GetParent (Directory.GetCurrentDirectory ())

会给你项目目录。

最好的解决方案

string PjFolder1 =
    Directory.GetParent(AppDomain.CurrentDomain.BaseDirectory).
        Parent.Parent.FullName;

其他解决方案

string pjFolder2 = Path.GetDirectoryName(Path.GetDirectoryName(Path.GetDirectoryName(
                System.Reflection.Assembly.GetExecutingAssembly().GetName().CodeBase)));

测试它，AppDomain.CurrentDomain.BaseDirectory在过去的项目中为我工作，现在我得到调试文件夹....所选的好答案就是不行!

//Project DEBUG folder, but STILL PROJECT FOLDER
string pjDebugFolder = AppDomain.CurrentDomain.BaseDirectory;

//Visual studio folder, NOT PROJECT FOLDER
//This solutions just not work
string vsFolder = Directory.GetCurrentDirectory();
string vsFolder2 = Environment.CurrentDirectory;
string vsFolder3 = Path.GetFullPath(".\\");   

//Current PROJECT FOLDER
string ProjectFolder = 
    //Get Debug Folder object from BaseDirectory ( the same with end slash)
    Directory.GetParent(pjDebugFolder).
    Parent.//Bin Folder object
    Parent. //Project Folder object
    FullName;//Project Folder complete path