Add "Everyone" privilege to folder using C#.NET
The below code checks for the folder existence, if not created, creates one. And then sets every user- permission of that folder with full permission (read & write).
string file = @"D:\Richi";
private static void GrantAccess(string file)
{
bool exists = System.IO.Directory.Exists(file);
if (!exists)
{
DirectoryInfo di = System.IO.Directory.CreateDirectory(file);
Console.WriteLine("The Folder is created Sucessfully");
}
else
{
Console.WriteLine("The Folder already exists");
}
DirectoryInfo dInfo = new DirectoryInfo(file);
DirectorySecurity dSecurity = dInfo.GetAccessControl();
dSecurity.AddAccessRule(new FileSystemAccessRule(new SecurityIdentifier(WellKnownSidType.WorldSid, null), FileSystemRights.FullControl, InheritanceFlags.ObjectInherit | InheritanceFlags.ContainerInherit, PropagationFlags.NoPropagateInherit, AccessControlType.Allow));
dInfo.SetAccessControl(dSecurity);
}
First thing I want to tell you is how I found this solution. This is probably more important than the answer because file permissions are hard to get correct.
First thing I did was set the permissions I wanted using the Windows dialogs and checkboxes. I added a rule for "Everyone" and ticked all boxes except "Full Control".
Then I wrote this C# code to tell me exactly what parameters I need to duplicate the Windows settings:
string path = @"C:\Users\you\Desktop\perms"; // path to directory whose settings you have already correctly configured
DirectorySecurity sec = Directory.GetAccessControl(path);
foreach (FileSystemAccessRule acr in sec.GetAccessRules(true, true, typeof(System.Security.Principal.NTAccount))) {
Console.WriteLine("{0} | {1} | {2} | {3} | {4}", acr.IdentityReference.Value, acr.FileSystemRights, acr.InheritanceFlags, acr.PropagationFlags, acr.AccessControlType);
}
This gave me this line of output:
Everyone | Modify, Synchronize | ContainerInherit, ObjectInherit | None | Allow
So the solution is simple (yet hard to get right if you don't know what to look for!):
DirectorySecurity sec = Directory.GetAccessControl(path);
// Using this instead of the "Everyone" string means we work on non-English systems.
SecurityIdentifier everyone = new SecurityIdentifier(WellKnownSidType.WorldSid, null);
sec.AddAccessRule(new FileSystemAccessRule(everyone, FileSystemRights.Modify | FileSystemRights.Synchronize, InheritanceFlags.ContainerInherit | InheritanceFlags.ObjectInherit, PropagationFlags.None, AccessControlType.Allow));
Directory.SetAccessControl(path, sec);
This will make the checkboxes on the Windows security dialog match what you have already set for your test directory.