Listing of computers on the network not working in windows 10 OS

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C#2.0

I am using the following code for list all the computers in a network. It is working fine in all all OS except Windows 10. while debugging I could see that the "childentry" returns nothing. Also there is no error on this code.

DirectoryEntry ParentEntry = new DirectoryEntry();
            try
            {
                
                ParentEntry.Path = "WinNT:";
                foreach  (DirectoryEntry childEntry in ParentEntry.Children)
                {
                    TreeNode newNode = new TreeNode(childEntry.Name);
                    if (childEntry.SchemaClassName == "Domain")
                    {
                        TreeNode ParentDomain = new TreeNode(childEntry.Name);
                        treeView1.Nodes.AddRange(new TreeNode[] { ParentDomain });
                        //DirectoryEntry SubChildEntry;
                        DirectoryEntry SubParentEntry = new DirectoryEntry();
                        SubParentEntry.Path = "WinNT://" + childEntry.Name;
                        foreach  (DirectoryEntry SubChildEntry in SubParentEntry.Children)
                        {
                            TreeNode newNode1 = new TreeNode(SubChildEntry.Name);
                            if (SubChildEntry.SchemaClassName == "Computer")
                            {
                                ParentDomain.Nodes.Add(newNode1);
                            }
                        }
                    }
                }
             
            }
            catch (Exception Excep)
            {
                MessageBox.Show ("Error While Reading Directories");
            }
            finally
            {
                ParentEntry = null;
            }

What I have tried:

Searched any kind of solution for this on the net.