Access is denied exception when using Process.Start() to open folder

According to MSDN (https://msdn.microsoft.com/en-us/library/53ezey2s(v=vs.110).aspx) the System.Diagnostics.Process.Start(string) runs the file or process (and therefore does not open the folder). For opening a folder, the https://msdn.microsoft.com/en-us/library/h6ak8zt5(v=vs.110).aspx sugests that you might do this with System.Diagnostics.Process.Start(string, string) where first should be a way to explorer, Total commander or something similar, and second should be a argument telling the used explorer what to do (open the folder pathToFolder).

I suppose that some system variable stores the value for "default folder viewer" but I do not know where. I will try to go for it and return later with the answer.

Hope that it helps.

---

EDIT: I did some quick digging around and to open the folder the following should do the trick:

System.Diagnostics.Process.Start(Environment.GetEnvironmentVariable("WINDIR") + @"\explorer.exe", pathToFolder);

Where first argument is a path to classical windows explorer and second is the actual path to the folder itself. It seem that widows does not by itself hold path to other "folder viewer" (such as Total Commander etc.), so this way is probably off the table.

Try this:

var psi = new System.Diagnostics.ProcessStartInfo() { FileName = pathToFolder, UseShellExecute = true };
System.Diagnostics.Process.Start(psi);