在Visual Studio 2010扩展中获取默认项目目录

Question

如何从Visual Studio 2010扩展中获取默认项目创建目录？默认情况下，该目录是：

C:\Users\<username>\Documents\Visual Studio 2010\Projects 

我猜这是通过工具 - >选项窗口中完成，但我不知道如何在这个通过SDK获取。

乍一看下面看起来应该让我接近：

DTE2 dte = CType(GetService(typeof(SDTE)), DTE2); 
Object props = dte.Properties("Projects and Solutions", "General"); 

，但我得到了以下错误：

System.Runtime.InteropServices.COMException was unhandled by user code 
ErrorCode=-2147352565 
Message=Invalid index. (Exception from HRESULT: 0x8002000B (DISP_E_BADINDEX)) 

Answer 1

发现：
http://msdn.microsoft.com/en-us/library/ms165642.aspx

After Visual Studio has been run once, the property item names for the current instance of Visual Studio are stored in the following Windows registry key: HKCU\SOFTWARE\Microsoft\VisualStudio\10.0_Config\AutomationProperties. This location always has the definitive list of names. The category names are the names of the subkeys of the AutomationProperties key (Database Tools, FontsAndColors, and so on). The page names are the names of the subkeys of the category keys. For example, the FontsAndColors category contains the Dialogs and Tool Windows, Printer, and TextEditor pages. You can view the registry by using the registry editor.

这里是获取值的代码，寻找：

string defaultProjectPath = (string)(DTE.Properties("Environment", "ProjectsAndSolution").Item["ProjectsLocation"].Value); 

注意，在注册表中的值不与你在Visual Studio中那么一点点的侦探工作需要去，你要寻找的确切值看到的内容相符。我认为它是以这种方式设置的，因为它具有向后兼容性。