删除文件夹内的所有文件夹？

Question

Hey guys so I'm working on a small program which sorta speeds up your pc, but I have a problem I get an exception if I try to delete files, I believe cause they are in use. Though it deletes some, but not much. My question is how to delete files in use, and how to delete sub folders inside the folder

//this is my directory:

DirectoryInfo tempPath = new DirectoryInfo(@"C:\Users\" + Environment.UserName + @"\AppData\Local\Temp");

private void button8_Click(object sender, EventArgs e)
{           
    if (checkBox5.Checked)
    {
        //loop through these files
        foreach (FileInfo file in tempPath.GetFiles())
        {
            //delete files in content
            file.Delete();
        }
    }
}

Answer 1

You must delete Folder recursivly with set FileAttributes normal.

private static void DeleteAllFolderRecursive(DirectoryInfo yourBaseDir)  
{  
    baseDir.Attributes = FileAttributes.Normal;  
    foreach (var childDir in baseDir.GetDirectories())  
        DeleteFolderRecursive(childDir);  

    foreach (var file in baseDir.GetFiles())  
        file.IsReadOnly = false;  

    baseDir.Delete(true);  
}  

And you call this :

DirectoryInfo tempPath = new DirectoryInfo(@"C:\Users\" + Environment.UserName + @"\AppData\Local\Temp");
DeleteAllFolderRecursive(tempPath);