如何在Windows7的C:\ Program Files(x86)\ myAplication中创建文件?

嗨.

我有一个VS 2008解决方案，其中有2个项目.
一个项目是输出myApp.exe的实际应用程序，另一个项目是链接到第一个项目的VS安装项目.

安装程序会复制myApp.exe和C:\Program Files (x86)\appDir中的依赖项. myApp.exe在同一文件夹中尝试创建新文件，但没有成功.

myApp 中的代码看起来像这样:

Hi.

I have a VS 2008 solution in which there are 2 projects.
One project is the actual application that outputs myApp.exe and the other project is a VS setup project linked to the first project.

The installer copies myApp.exe and the dependencies in C:\Program Files (x86)\appDir. In this same folder myApp.exe is trying, with no success, to create a new file.

The code in myApp looks something like this:

File.WriteAllLines(
   Application.StartupPath + "myFile.txt",
   new string[]{"test1", "test2", "test3"});

在Windows XP上可以正常使用.

在Windows 7上，我得到一个System.UnauthorizedAccessException，内容为:"Attempt to perform an unauthorized operation".我认为这是因为appDir 文件夹是在安装时使用管理员权限创建的，而在运行时myApp.exe会尝试使用用户权限进行写入.

问题1:如何修改安装项目，以便它可以通过用户写入权限创建appDir ?

或

问题2:如何编写代码，以便系统允许我创建新文件而不受访问权限的约束?

有人可以帮我解决这个问题吗?
谢谢！

PS:我已经尝试过了，但是也失败了:

On Windows XP this works just fine.

On Windows 7 I get a System.UnauthorizedAccessException that reads: "Attempt to perform an unauthorized operation". I believe this is because on install the appDir folder is created using Administrator permissions and on run-time myApp.exe tries to write using User permissions.

Q1: How can I modify the setup project so that it can create the appDir with User writing access?

OR

Q2: How can I write the code so that the system allows me to create a new file regardless of access permissions?

Can anyone please help me with this issue?
Thank you!

PS: I''ve tried this and it fails as well:

DirectoryInfo dInfo = new DirectoryInfo(Application.StartupPath);
DirectorySecurity dSecurity = dInfo.GetAccessControl();
FileSystemAccessRule fsar = new FileSystemAccessRule(
                                  WindowsIdentity.GetCurrent().Name,
                                  FileSystemRights.WriteData,
                                  AccessControlType.Allow);
dSecurity.AddAccessRule(fsar);
dInfo.SetAccessControl(dSecurity);