void LoadViewModel(string initialSearch)
        {
            viewModel.ClearPackagesOnPaging = false;
            viewModel.SearchTerms           = initialSearch;

            ClearSelectedPackageInformation();
            PopulatePackageSources();
            viewModel.PropertyChanged += ViewModelPropertyChanged;

            if (viewModel.SelectedPackageSource != null)
            {
                viewModel.ReadPackages();
            }
            else
            {
                HideLoadingMessage();
            }
        }
        void LoadViewModel(string initialSearch)
        {
            viewModel.ClearPackagesOnPaging = false;
            viewModel.SearchTerms           = initialSearch;

            viewModel.IncludePrerelease   = GetIncludePrereleaseUserPreference();
            showPrereleaseCheckBox.Active = viewModel.IncludePrerelease;

            ClearSelectedPackageInformation();
            PopulatePackageSources();
            viewModel.PropertyChanged += ViewModelPropertyChanged;

            if (viewModel.SelectedPackageSource != null)
            {
                viewModel.ReadPackages();
            }
            else
            {
                HideLoadingMessage();
            }
        }