IE.cs

using System;
using System.IO;
using System.Windows.Forms;
using Microsoft.Win32;

namespace Example
{
    static class IE
    {
        private const string FeatureControlKey = @"SOFTWARE\Microsoft\Internet Explorer\Main\FeatureControl";

        /// <summary>
        /// Update the Windows Registry to configure the WebBrowser control to run the latest version
        /// of IE for the currently executing program.
        /// </summary>
        public static void UpdateRegistry()
        {
            var currentUserKey = RegistryKey.OpenBaseKey(RegistryHive.CurrentUser, RegistryView.Registry64);
            var valueName = Path.GetFileName(Application.ExecutablePath);
            RegistryKey regKey = null;
            try 
            {
                // Registry setting to run IE11 mode.
                const string keyName = FeatureControlKey + @"\FEATURE_BROWSER_EMULATION";
                regKey = currentUserKey.CreateSubKey(keyName);
                regKey?.SetValue(valueName, 0x2af9, RegistryValueKind.DWord);
            }
            catch (Exception ex) 
            {
                MessageBox.Show(ex.Message);
            }
            finally 
            {
                regKey?.Close();
                regKey = null;
            }

            try 
            {
                // Registry setting for correct operation on high DPI monitors
                const string keyName = FeatureControlKey + @"\FEATURE_96DPI_PIXEL";
                regKey = currentUserKey.CreateSubKey(keyName);
                regKey?.SetValue(valueName, 1, RegistryValueKind.DWord);
            } 
            catch (Exception ex) 
            {
                MessageBox.Show(ex.Message);
            } 
            finally 
            {
                regKey?.Close();
                currentUserKey.Close();
            }
        }
    }
}