C# - set directory permissions for Everyone to Full Control. Useful when you need to store settings and other files in your app directory

gistfile1.txt

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Security.Principal;
using System.Security.AccessControl;
using System.IO;

namespace RSSetDirPermissionsCS
{
    public class RsDirPermissions
    {

        string _lastError = "";
        
        /// <summary>
        /// Set Everyone Full Control permissions for selected directory
        /// </summary>
        /// <param name="dirName"></param>
        /// <returns></returns>
       bool SetEveryoneAccess(string dirName)
        {

            try
            {
                // Make sure directory exists
                if (Directory.Exists(dirName) == false)
                    throw new Exception(string.Format("Directory {0} does not exist, so permissions cannot be set.", dirName));

                // Get directory access info
                DirectoryInfo dinfo = new DirectoryInfo(dirName);
                DirectorySecurity dSecurity = dinfo.GetAccessControl();

                // Add the FileSystemAccessRule to the security settings. 
                dSecurity.AddAccessRule(new FileSystemAccessRule(new SecurityIdentifier(WellKnownSidType.WorldSid, null), FileSystemRights.FullControl, InheritanceFlags.ObjectInherit | InheritanceFlags.ContainerInherit, PropagationFlags.NoPropagateInherit, AccessControlType.Allow));

                // Set the access control
                dinfo.SetAccessControl(dSecurity);

                _lastError = String.Format("Everyone FullControl Permissions were set for directory {0}", dirName));

                return true;

            } catch (Exception ex)
            {
                _lastError = ex.Message;
                return false;
            }


        }

    }
}

Thank you. I will tried.

Thank you for your code, I tested and it worked very well. I have a small problem, folowing microsoft document, it support only on Windows platform. Except "command line", does we have any solution for Linux?

In Linux I'm guessing you would need to use chmod or something else to set appropriate file and directory authorities. You should be able to execute chmod from .Net in Linux.

It's good information for me. Thank you @richardschoen !