我在过去的NUnit中得到了相同的行为。默认情况下，NUnit将程序集复制到临时目录。你可以在NUnit设置中改变这种行为:

也许TestDriven。NET和MbUnit GUI有相同的设置。

AppDomain.CurrentDomain.BaseDirectory

工作与MbUnit GUI。

在windows窗体应用程序中，你可以简单地使用应用程序。StartupPath

但对于dll和控制台应用程序，代码更难记住…

string slash = Path.DirectorySeparatorChar.ToString();
string root = Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().Location);

root += slash;
string settingsIni = root + "settings.ini"

当开发人员可以更改代码以包含所需的代码片段时，所有建议的答案都是有效的，但如果您希望在不更改任何代码的情况下做到这一点，则可以使用Process Explorer。

它将列出系统中所有正在执行的dll，您可能需要确定正在运行的应用程序的进程id，但这通常并不太难。

我已经写了一个完整的描述如何在II - http://nodogmablog.bryanhogan.net/2016/09/locating-and-checking-an-executing-dll-on-a-running-web-server/中为一个dll做到这一点

我一直在用汇编。用CodeBase代替Location:

Assembly a;
a = Assembly.GetAssembly(typeof(DaoTests));
string s = a.CodeBase.ToUpper(); // file:///c:/path/name.dll
Assert.AreEqual(true, s.StartsWith("FILE://"), "CodeBase is " + s);
s = s.Substring(7, s.LastIndexOf('/') - 7); // 7 = "file://"
while (s.StartsWith("/")) {
    s = s.Substring(1, s.Length - 1);
}
s = s.Replace("/", "\\");

它一直在工作，但我不再确定它是100%正确的。http://blogs.msdn.com/suzcook/archive/2003/06/26/assembly-codebase-vs-assembly-location.aspx的网页上写着:

"The CodeBase is a URL to the place where the file was found, while the Location is the path where it was actually loaded. For example, if the assembly was downloaded from the internet, its CodeBase may start with "http://", but its Location may start with "C:\". If the file was shadow-copied, the Location would be the path to the copy of the file in the shadow copy dir. It’s also good to know that the CodeBase is not guaranteed to be set for assemblies in the GAC. Location will always be set for assemblies loaded from disk, however."

您可能希望使用CodeBase而不是Location。

这是我想到的。在web项目之间，单元测试(nunit和resharper测试运行器);我发现这对我很有用。

我一直在寻找代码来检测构建在什么配置中，调试/发布/定制名。唉，#if DEBUG. #如果有人能改进的话!

请随意编辑和改进。

获取应用程序文件夹。有用的web根，单元测试，以获得测试文件的文件夹。

public static string AppPath
{
    get
    {
        DirectoryInfo appPath = new DirectoryInfo(AppDomain.CurrentDomain.BaseDirectory);

        while (appPath.FullName.Contains(@"\bin\", StringComparison.CurrentCultureIgnoreCase)
                || appPath.FullName.EndsWith(@"\bin", StringComparison.CurrentCultureIgnoreCase))
        {
            appPath = appPath.Parent;
        }
        return appPath.FullName;
    }
}

获取bin文件夹:用于使用反射执行程序集。如果文件复制到那里由于构建属性。

public static string BinPath
{
    get
    {
        string binPath = AppDomain.CurrentDomain.BaseDirectory;

        if (!binPath.Contains(@"\bin\", StringComparison.CurrentCultureIgnoreCase)
            && !binPath.EndsWith(@"\bin", StringComparison.CurrentCultureIgnoreCase))
        {
            binPath = Path.Combine(binPath, "bin");
            //-- Please improve this if there is a better way
            //-- Also note that apps like webapps do not have a debug or release folder. So we would just return bin.
#if DEBUG
            if (Directory.Exists(Path.Combine(binPath, "Debug"))) 
                        binPath = Path.Combine(binPath, "Debug");
#else
            if (Directory.Exists(Path.Combine(binPath, "Release"))) 
                        binPath = Path.Combine(binPath, "Release");
#endif
        }
            return binPath;
    }
}