protected ApplicationPackageUpgrade(PackageUpgradeVersion dependentPackageVersion, Version appVersion)
     : base(dependentPackageVersion)
 {
     AppVersion = appVersion;
 }
 protected InternalPackageUpgrade(PackageUpgradeVersion version)
     : base(version)
 {
 }
 internal PackageUpgrade(PackageUpgradeVersion dependentPackageVersion)
 {
     DependentPackageVersion = dependentPackageVersion;
 }