与John的答案相同，但扩展方法略少啰嗦。

public static string GetDirectoryPath(this Assembly assembly)
{
    string filePath = new Uri(assembly.CodeBase).LocalPath;
    return Path.GetDirectoryName(filePath);            
}

现在你可以做:

var localDir = Assembly.GetExecutingAssembly().GetDirectoryPath();

或者如果你喜欢:

var localDir = typeof(DaoTests).Assembly.GetDirectoryPath();

string path = Path.GetDirectoryName(typeof(DaoTests).Module.FullyQualifiedName);

ASP。网络，不管用。我在为什么AppDomain.CurrentDomain.BaseDirectory不包含asp.net应用程序中的“bin”中找到了一个更好的解决方案。它适用于Win Application和ASP。Net Web应用程序。

public string ApplicationPath
    {
        get
        {
            if (String.IsNullOrEmpty(AppDomain.CurrentDomain.RelativeSearchPath))
            {
                return AppDomain.CurrentDomain.BaseDirectory; //exe folder for WinForms, Consoles, Windows Services
            }
            else
            {
                return AppDomain.CurrentDomain.RelativeSearchPath; //bin folder for Web Apps 
            }
        }
    }

var assembly = System.Reflection.Assembly.GetExecutingAssembly();
var assemblyPath = assembly.GetFiles()[0].Name;
var assemblyDir = System.IO.Path.GetDirectoryName(assemblyPath);

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。

AppDomain.CurrentDomain.BaseDirectory

工作与MbUnit GUI。