C#获取系统当前IE版本号

RegistryKey mainKey = Registry.LocalMachine;
RegistryKey subKey = mainKey.OpenSubKey(@\"SOFTWARE\\Microsoft\\Internet Explorer\");

/// <summary>
/// 获取IE详细版本号
/// </summary>
/// <param name=\"text\"></param>
/// <returns></returns>
public static string GetDetailVersion(string text)
  {
   //通过WebBrowser方案获取版本号
   //int mainVer = (new WebBrowser()).Version.Major;

   //通过注册表获取用户IE版本号
   RegistryKey mainKey = Registry.LocalMachine;
   RegistryKey subKey = mainKey.OpenSubKey(text);

   var versionNumber = subKey?.GetValue(\"svcVersion\")?.ToString() ?? string.Empty;
   if ( string.IsNullOrEmpty(versionNumber))
     {
      versionNumber = subKey?.GetValue(\"svcUpdateVersion\")?.ToString() ?? string.Empty;
       if (string.IsNullOrEmpty(versionNumber))
      {
       versionNumber = subKey?.GetValue(\"Version\")?.ToString() ?? string.Empty;
      }
   }
  return versionNumber;
}

/// <summary>
  /// IE浏览器版本号帮助类
  /// </summary>
  public static class IEVersi er
  {
    /// <summary>
    /// 获取IE主版本号
    /// </summary>
    /// <param name=\"text\"></param>
    /// <returns></returns>
    public static string GetMajorVersion(string text)
    {
      var majorVersion = string.Empty;

      var detailVersion = GetDetailVersion(text);
      if (!string.IsNullOrWhiteSpace(detailVersion))
      {
        if (detailVersion.IndexOf(\".\", StringComparison.Ordinal) is int connectedCharFirstIndex && connectedCharFirstIndex > -1)
        {
          majorVersion = detailVersion.Substring(0, connectedCharFirstIndex);
        }
        else
        {
          majorVersion = detailVersion;
        }
      }

      return majorVersion;
    }

    /// <summary>
    /// 获取IE详细版本号
    /// </summary>
    /// <param name=\"text\"></param>
    /// <returns></returns>
    public static string GetDetailVersion(string text)
    {
      //通过注册表获取用户IE版本号
      RegistryKey mainKey = Registry.LocalMachine;
      RegistryKey subKey = mainKey.OpenSubKey(text);

      var versionNumber = subKey?.GetValue(\"svcVersion\")?.ToString() ?? string.Empty;
      if ( string.IsNullOrEmpty(versionNumber))
      {
        versionNumber = subKey?.GetValue(\"svcUpdateVersion\")?.ToString() ?? string.Empty;
        if (string.IsNullOrEmpty(versionNumber))
        {
          versionNumber = subKey?.GetValue(\"Version\")?.ToString() ?? string.Empty;
        }
      }
      return versionNumber;
    }
}