“ClickOnce does not support the request execution level 'requireAdministrator.'”

Question

So I was writing an application that requires access to the registry. I had not touched any build settings, wanting to get the thing working before I added the other touches

Answer 1

For those who use uncheck "Enable ClickOnce security settings" can't work, to try the method I find.

First, leave your app.manifest requestedExecutionLevel item as is:

And then you edit your Program.cs file like this:

using System;
using System.Diagnostics;
using System.Reflection;
using System.Security.Principal;
using System.Windows.Forms;

restruct main method like:

    static void Main()
        {
            var wi = WindowsIdentity.GetCurrent();
            var wp = new WindowsPrincipal(wi);

            bool runAsAdmin = wp.IsInRole(WindowsBuiltInRole.Administrator);

            if (!runAsAdmin)
            {
                // It is not possible to launch a ClickOnce app as administrator directly,
                // so instead we launch the app as administrator in a new process.
                var processInfo = new ProcessStartInfo(Assembly.GetExecutingAssembly().CodeBase);

                // The following properties run the new process as administrator
                processInfo.UseShellExecute = true;
                processInfo.Verb = "runas";

                // Start the new process
                try
                {
                    Process.Start(processInfo);
                }
                catch (Exception)
                {
                    // The user did not allow the application to run as administrator
                    MessageBox.Show("Sorry, but I don't seem to be able to start " + 
                       "this program with administrator rights!");
                }

                // Shut down the current process
                Application.Exit();
            }
            else
            {
                // We are running as administrator
                Application.EnableVisualStyles();
                Application.SetCompatibleTextRenderingDefault(false);
                Application.Run(new Form1());
            }
        }

It works on Windows 10 and Visual Studio 2019!