问题
.NET Compact Framework 提供了Directory.GetCurrentDirectory Method 取当前运行文件的目录，可是运行的时候会抛出 NotSupportedException 。
这个问题MSND的解释如下：
The operating system is Windows CE, which does not have current directory functionality.
This method is available in the .NET Compact Framework, but is not currently supported.
替代方案
使用 Path.GetDirectoryName Method 和 AssemblyName.CodeBase Property 来代替。
System.IO.Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().GetName().CodeBase);