public bool Validate(string installDir, string dataDir, string backupDir, string logDir, string tempDir)
    {
      this._model.Model.Logger.Log("Validating Paths");
      if (!string.IsNullOrEmpty(installDir))
        this._model.Model.Logger.Log("installDir=" + installDir);
      if (!string.IsNullOrEmpty(dataDir))
        this._model.Model.Logger.Log("dataDir=" + dataDir);
      if (!string.IsNullOrEmpty(backupDir))
        this._model.Model.Logger.Log("backupDir=" + backupDir);
      if (!string.IsNullOrEmpty(logDir))
        this._model.Model.Logger.Log("logDir=" + logDir);
      if (!string.IsNullOrEmpty(tempDir))
        this._model.Model.Logger.Log("tempDir=" + tempDir);
      if (this.RequiredDiskSpace.PackageCacheSize > 0UL)
        this.AddFolderToDriveList(this._commonAppDataFolder, this.RequiredDiskSpace.PackageCacheSize);
      if (this.RequiredDiskSpace.SystemSize > 0UL)
        this.AddFolderToDriveList(this._systemFolder, this.RequiredDiskSpace.SystemSize);
      if (this.RequiredDiskSpace.InstallDirSize > 0UL || !string.IsNullOrEmpty(installDir))
      {
        if (!this.ValidateInstallDir(installDir))
          return false;
        this.AddFolderToDriveList(installDir, this.RequiredDiskSpace.InstallDirSize);
      }
      if (this.RequiredDiskSpace.DataDirSize > 0UL || !string.IsNullOrEmpty(dataDir))
      {
        if (!this.ValidateDataDir(dataDir))
          return false;
        this.AddFolderToDriveList(dataDir, this.RequiredDiskSpace.DataDirSize);
      }
      if (this.RequiredDiskSpace.BackupDirSize > 0UL || !string.IsNullOrEmpty(backupDir))
      {
        if (!this.ValidateBackupDir(backupDir))
          return false;
        this.AddFolderToDriveList(backupDir, this.RequiredDiskSpace.BackupDirSize);
      }
      if (this.RequiredDiskSpace.LogDirSize > 0UL || !string.IsNullOrEmpty(logDir))
      {
        if (!this.ValidateLogDir(logDir))
          return false;
        this.AddFolderToDriveList(logDir, this.RequiredDiskSpace.LogDirSize);
      }
      if (this.RequiredDiskSpace.TempDirSize > 0UL || !string.IsNullOrEmpty(tempDir))
      {
        if (!this.ValidateTempDir(tempDir))
          return false;
        this.AddFolderToDriveList(tempDir, this.RequiredDiskSpace.TempDirSize);
      }
      foreach (DiskSpaceCalculator.InstallDrive installDrive in this.InstallDrives)
      {
        if (installDrive.RequiredSize > installDrive.FreeDiskSpace)
        {
          double num1 = (double) installDrive.RequiredSize / 1048576.0;
          double num2 = (double) installDrive.FreeDiskSpace / 1048576.0;
          string str1 = string.Format(this._model.LocalizationReader.GetString("General_MB"), (object) num1);
          string str2 = string.Format(this._model.LocalizationReader.GetString("General_MB"), (object) num2);
          if (num1 > 1024.0)
          {
            double num3 = num1 / 1024.0;
            double num4 = num2 / 1024.0;
            str1 = string.Format(this._model.LocalizationReader.GetString("General_GB"), (object) num3);
            str2 = string.Format(this._model.LocalizationReader.GetString("General_GB"), (object) num4);
          }
          this.Message = string.Format(this._model.LocalizationReader.GetString("ErrorMessage_InvalidPath_NotEnoughDiskSpacce"), (object) installDrive.DriveName, (object) str1, (object) str2);
          return false;
        }
      }
      double num = (double) this.RequiredDiskSpace.TotalSize / 1048576.0;
      string str = string.Format(this._model.LocalizationReader.GetString("General_MB"), (object) num);
      if (num > 1024.0)
        str = string.Format(this._model.LocalizationReader.GetString("General_GB"), (object) (num / 1024.0));
      this.Message = string.Format(this._model.LocalizationReader.GetString("General_InstallSizeInformation"), (object) str);
      return true;
    }