/// <summary>
        /// Start officec2rclient.exe with supplied params
        /// </summary>
        /// <param name="OfficeVersion"></param>
        /// <returns></returns>
        static bool LaunchUpdateProcess(int OfficeVersion)
        {
            string _officeConfigPath = string.Empty;

            if (OfficeVersion == 16)
            {
                _officeConfigPath = keyPath16;
            }
            else
            {
                _officeConfigPath = keyPath15;
            }

            string exePath = RegistryHelpers.GetRegistryValue(_officeConfigPath, OfficeC2RClientPathKey) as string;


            if (File.Exists(Path.Combine(exePath, C2RClientExe)))
            {
                // Launch it
                Process p;
                try
                {
                    p = new Process();
                    p.StartInfo.WorkingDirectory = exePath;
                    p.StartInfo.FileName         = C2RClientExe;
                    p.StartInfo.Arguments        = C2RClientArg + " " + _officec2rClientArgs; //do we need to cater for quotes
                    LogMessage("Starting " + p.StartInfo.FileName + " with params " + p.StartInfo.Arguments);
                    p.Start();
                    return(true);
                }
                catch (Exception ex)
                {
                    LogMessage("Failed to launch C2RClientExe");
                    LogMessage(string.Format("Exception occured:{0}, {1}", ex.Message, ex.StackTrace.ToString()));
                    return(false);
                }
            }
            else
            {
                LogMessage(string.Format("OfficeC2RClient.exe doesn't exist at {0}", exePath));
                return(false);
            }
        }
        /// <summary>
        /// Determine which Office version is installed on users PC
        /// </summary>
        /// <returns>15, or 16, or -1 if no Office / failure </returns>
        static int GetOfficeVersion()
        {
            try
            {
                //must be better way of doing this
                string c2rclientPath = RegistryHelpers.GetRegistryValue(keyPath16, OfficeC2RClientPathKey) as string;
                if (c2rclientPath != null)
                {
                    if (File.Exists(Path.Combine(c2rclientPath, C2RClientExe)))
                    {
                        return(16);
                    }
                }
                else
                {
                    LogMessage("Couldnt open registy key for Office 16 " + keyPath16 + " value " + OfficeC2RClientPathKey);
                }

                c2rclientPath = RegistryHelpers.GetRegistryValue(keyPath15, OfficeC2RClientPathKey) as string;
                if (c2rclientPath != null)
                {
                    if (File.Exists(Path.Combine(c2rclientPath, C2RClientExe)))
                    {
                        return(15);
                    }
                }
                else
                {
                    LogMessage("Couldnt open registy key for Office 15 " + keyPath15 + " value " + OfficeC2RClientPathKey);
                }

                return(-1);
            }
            catch (Exception ex)
            {
                LogMessage("Error trying to open registry keys to identify Office version installed");
                LogMessage(string.Format("Exception occured:{0}, {1}", ex.Message, ex.StackTrace.ToString()));
                return(-1);
            }
        }
        /// <summary>
        /// Get Office 365 Pro Plus updateurl from registry
        /// </summary>
        /// <param name="OfficeVersion">15 or 16 supported</param>
        /// <returns></returns>
        static string GetOfficeUpdateUrl(int OfficeVersion)
        {
            try
            {
                string regPath = string.Empty;
                if (OfficeVersion == 16)
                {
                    regPath = keyPath16;
                }
                else
                {
                    regPath = keyPath15;
                }

                string updateUrl = RegistryHelpers.GetRegistryValue(regPath, UpdatePathKey) as string;
                return(updateUrl.ToLower());
            }
            catch (Exception ex)
            {
                LogMessage("Error getting UpdateURL from registry");
                LogMessage(string.Format("Exception occured:{0}, {1}", ex.Message, ex.StackTrace.ToString()));
                return(string.Empty);
            }
        }