C# WebBrowser IE버전 알맞게 변경하는 방법

public Form1()
{
    InitializeComponent();

    SetBrowserEmulationVersion();
}

private const string InternetExplorerRootKey = @"Software\Microsoft\Internet Explorer";
private const string BrowserEmulationKey = InternetExplorerRootKey + @"\Main\FeatureControl\FEATURE_BROWSER_EMULATION";

public enum BrowserEmulationVersion
{
    Default = 0,
    Version7 = 7000,
    Version8 = 8000,
    Version8Standards = 8888,
    Version9 = 9000,
    Version9Standards = 9999,
    Version10 = 10000,
    Version10Standards = 10001,
    Version11 = 11000,
    Version11Edge = 11001
}

#region 현재 설치되어있는 IE Explorer 버전 읽어오는것
public static int GetInternetExplorerMajorVersion()
{
    int result = 0;
    try
    {
        RegistryKey key = Registry.LocalMachine.OpenSubKey(InternetExplorerRootKey);

        if (key != null)
        {
            object value;
            value = key.GetValue("svcVersion", null) ?? key.GetValue("Version", null);

            if (value != null)
            {
                string version;
                int separator;

                version = value.ToString();
                separator = version.IndexOf('.');

                if (separator != -1)
                    int.TryParse(version.Substring(0, separator), out result);

            }
        }
    }

    catch (SecurityException)
    {
        // The user does not have the permissions required to read from the registry key.
    }
    catch (UnauthorizedAccessException)
    {
        // The user does not have the necessary registry rights.
    }

    return result;
}
#endregion

#region 에뮬레이션 브라우저 버전 읽어오기
public static BrowserEmulationVersion GetBrowserEmulationVersion()
{
    BrowserEmulationVersion result = BrowserEmulationVersion.Default;

    try
    {
        RegistryKey key = Registry.CurrentUser.OpenSubKey(BrowserEmulationKey, true);

        if (key != null)
        {
            string programName;
            object value;

            programName = Path.GetFileName(Environment.GetCommandLineArgs()[0]);
            value = key.GetValue(programName, null);

            if (value != null)
                result = (BrowserEmulationVersion)Convert.ToInt32(value);
        }
    }

    catch (SecurityException)
    {
        // The user does not have the permissions required to read from the registry key.
    }
    catch (UnauthorizedAccessException)
    {
        // The user does not have the necessary registry rights.
    }

    return result;
}

public static bool IsBrowserEmulationSet() => GetBrowserEmulationVersion() != BrowserEmulationVersion.Default;
#endregion

#region 에뮬레이션 브라우저 설정
public static bool SetBrowserEmulationVersion(BrowserEmulationVersion browserEmulationVersion)
{
    bool result = false;

    try
    {
        RegistryKey key = Registry.CurrentUser.OpenSubKey(BrowserEmulationKey, true);

        if (key != null)
        {
            string programName = Path.GetFileName(Environment.GetCommandLineArgs()[0]);

            if (browserEmulationVersion != BrowserEmulationVersion.Default)
            {
                // if it's a valid value, update or create the value
                key.SetValue(programName, (int)browserEmulationVersion, RegistryValueKind.DWord);
            }
            else
            {
                // otherwise, remove the existing value
                key.DeleteValue(programName, false);
            }

            result = true;
        }
    }
    catch (SecurityException)
    {
        // The user does not have the permissions required to read from the registry key.
    }
    catch (UnauthorizedAccessException)
    {
        // The user does not have the necessary registry rights.
    }
    return result;
}
public static bool SetBrowserEmulationVersion()
{
    int ieVersion = GetInternetExplorerMajorVersion();
    BrowserEmulationVersion emulationCode;

    if (ieVersion >= 11)
    {
        emulationCode = BrowserEmulationVersion.Version11;
    }
    else
    {
        switch (ieVersion)
        {
            case 10:
                emulationCode = BrowserEmulationVersion.Version10;
                break;
            case 9:
                emulationCode = BrowserEmulationVersion.Version9;
                break;
            case 8:
                emulationCode = BrowserEmulationVersion.Version8;
                break;
            default:
                emulationCode = BrowserEmulationVersion.Version7;
                break;
        }
    }
    return SetBrowserEmulationVersion(emulationCode);
}
#endregion