Delete everything in a directory except a file in C#

Question

I am having trouble deleting everything in a directory except a file (index.dat) I am trying to clear the cookies folder and the temp folder of files but I get an error when I try to delete index.dat because its being used by another process. Is there a way to delete everything in the temp and cookies folder except the index.dat file? Here is my code:

string userProfile = Environment.GetEnvironmentVariable("USERPROFILE");
string strDirLocalq = Path.Combine(userProfile, "AppData");
string strDirLocalw = Path.Combine(strDirLocalq, "Roaming");
string strDirLocale = Path.Combine(strDirLocalw, "Microsoft");
string strDirLocalr = Path.Combine(strDirLocale, "Windows");
string strDirLocalt = Path.Combine(strDirLocalr, "Cookies");

string[] filePaths = Directory.GetFiles(strDirLocalt);
foreach (string filePath in filePaths)
    File.Delete(filePath);

Answer 1

This works:

string[] filePaths = Directory.GetFiles(strDirLocalt);
foreach (string filePath in filePaths)
{
    var name = new FileInfo(filePath).Name;
    name = name.ToLower();
    if (name != "index.dat")
    {
        File.Delete(filePath);
    }
}

Answer 2

Check out this interesting solution!

List<string> files = new List<string>(System.IO.Directory.GetFiles(strDirLocalt));
files.ForEach(x => { try { System.IO.File.Delete(x); } catch { } });

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