poc-misc/CustomUrlSchemeRegistrationPoC/CustomUriSchemeRegistration.cs

using Microsoft.Win32;
using System;

namespace CustomUrlSchemeRegistrationPoC
{
    internal class CustomUriSchemeRegistration
    {
        private readonly string _urlScheme;
        private readonly string _displayName;
        private readonly string _exeFilePath;

        public CustomUriSchemeRegistration(string urlScheme, string displayName, string exeFilePath)
        {
            _urlScheme = urlScheme;
            _displayName = displayName;
            _exeFilePath = exeFilePath;
        }

        private static RegistryKey Target => Registry.ClassesRoot;

        public bool Install(out Exception exception)
        {
            try
            {
                using (var keyClass = Target.CreateSubKey(_urlScheme))
                {
                    keyClass.SetValue(null, _displayName);
                    keyClass.SetValue("URL Protocol", "");
                }
                using (var keyCommand = Target.CreateSubKey(_urlScheme + @"\shell\open\command"))
                {
                    keyCommand.SetValue(null, "\"" + _exeFilePath + "\" %1");
                }
                exception = null;
                return true;
            }
            catch (Exception ex)
            {
                exception = ex;
                return false;
            }
        }

        public bool Uninstall(out Exception exception)
        {
            try
            {
                using (Target)
                {
                    if (Target.OpenSubKey(_urlScheme) != null)
                    {
                        Target.DeleteSubKeyTree(_urlScheme);
                    }
                }

                exception = null;
                return true;
            }
            catch (Exception ex)
            {
                exception = ex;
                return false;
            }
        }
    }
}