AGENT.PackageViewer.ViewModels.PackageViewerViewModel.ChoosePackageDialog C# (CSharp) Method

        private void ChoosePackageDialog()
        {
            // Configure open file dialog box 
            Microsoft.Win32.OpenFileDialog dlg = new Microsoft.Win32.OpenFileDialog();
            dlg.FileName = "Document"; // Default file name 
            dlg.DefaultExt = ".AGT"; // Default file extension 
            dlg.Filter = "Agent Package (.agt)|*.agt"; // Filter files by extension 

            // Show open file dialog box 
            Nullable<bool> result = dlg.ShowDialog();

            // Process open file dialog box results 
            if (result == true)
            {
                // Open document 
                PackageSource = dlg.FileName;

                ICSharpCode.SharpZipLib.Zip.FastZip fz = new FastZip();

                var root = System.IO.Path.Combine(System.IO.Path.GetTempPath(), (Guid.NewGuid().ToString()));

                fz.ExtractZip(PackageSource, root, FastZip.Overwrite.Always, null, null, null, true);

                PackageFile = System.IO.Path.Combine(root, "package.json");

                if (System.IO.File.Exists(PackageFile))
                {
                    var cnt =  System.IO.File.ReadAllText(PackageFile);
                    Contents = cnt;
                }
            }
        }