Check for access rights on a folder using C#

Question

I need check if a specific user (Domain or Local), has mentioned rights (Read / Write) on the given directory.

The method should return true even the User is inheriting the rights from User Group (like Administrators).

This answer works fine but it is limited to Current User only

Answer 1

Try the bellow function

using System.IO;
using System.Security.AccessControl; 

     public static bool CheckWritePermissionOnDir(string path)
        {
            var writeAllow = false;
            var writeDeny = false;
            var accessControlList = Directory.GetAccessControl(path); Control
            if (accessControlList == null)
                return false;
            var accessRules = accessControlList.GetAccessRules(true, true, typeof(System.Security.Principal.SecurityIdentifier));
            if (accessRules == null)
                return false;

            foreach (FileSystemAccessRule rule in accessRules)
            {
                if ((FileSystemRights.Write & rule.FileSystemRights) != FileSystemRights.Write)
                    continue;

                if (rule.AccessControlType == AccessControlType.Allow)
                    writeAllow = true;
                else if (rule.AccessControlType == AccessControlType.Deny)
                    writeDeny = true;
            }

            return writeAllow && !writeDeny;
        }