public async Task InstallApplicationAsync()

in WindowsDevicePortalWrapper/WindowsDevicePortalWrapper.UniversalWindows/Core/AppDeployment.cs [126:271]
121 lines of code
10 McCabe index (conditional complexity)

        public async Task InstallApplicationAsync(
            string appName,
            StorageFile packageFile, 
            List<StorageFile> dependencyFiles,
            StorageFile certificateFile = null,
            short stateCheckIntervalMs = 500,
            short timeoutInMinutes = 15,
            bool uninstallPreviousVersion = true)
        {
            string installPhaseDescription = string.Empty;

            try
            {
                // If appName was not provided, use the package file name
                if (string.IsNullOrWhiteSpace(appName))
                {
                    appName = packageFile.DisplayName;
                }

                // Uninstall the application's previous version, if one exists.
                if (uninstallPreviousVersion)
                {
                    installPhaseDescription = string.Format("Uninstalling any previous version of {0}", appName);
                    this.SendAppInstallStatus(
                        ApplicationInstallStatus.InProgress,
                        ApplicationInstallPhase.UninstallingPreviousVersion,
                        installPhaseDescription);
                    AppPackages installedApps = await this.GetInstalledAppPackagesAsync();
                    foreach (PackageInfo package in installedApps.Packages)
                    {
                        if (package.Name == appName)
                        {
                            await this.UninstallApplicationAsync(package.FullName);
                            break;
                        }
                    }
                }

                // Create the API endpoint and generate a unique boundary string.
                Uri uri;
                string boundaryString;
                this.CreateAppInstallEndpointAndBoundaryString(
                    packageFile.Name,
                    out uri,
                    out boundaryString);

                using (MemoryStream dataStream = new MemoryStream())
                {
                    byte[] data;

                    // Copy the application package.
                    installPhaseDescription = string.Format("Copying: {0}", packageFile.Name);
                    this.SendAppInstallStatus(
                        ApplicationInstallStatus.InProgress,
                        ApplicationInstallPhase.CopyingFile,
                        installPhaseDescription);
                    data = Encoding.ASCII.GetBytes(string.Format("--{0}\r\n", boundaryString));
                    dataStream.Write(data, 0, data.Length);
                    await CopyFileToRequestStream(
                        packageFile,
                        dataStream);

                    // Copy dependency files, if any.
                    foreach (StorageFile depFile in dependencyFiles)
                    {
                        installPhaseDescription = string.Format("Copying: {0}", depFile.Name);
                        this.SendAppInstallStatus(
                            ApplicationInstallStatus.InProgress,
                            ApplicationInstallPhase.CopyingFile,
                            installPhaseDescription);
                        data = Encoding.ASCII.GetBytes(string.Format("\r\n--{0}\r\n", boundaryString));
                        dataStream.Write(data, 0, data.Length);
                        await CopyFileToRequestStream(
                            depFile, 
                            dataStream);
                    }

                    // Copy the certificate file, if provided.
                    if (certificateFile != null)
                    {
                        installPhaseDescription = string.Format("Copying: {0}", certificateFile.Name);
                        this.SendAppInstallStatus(
                            ApplicationInstallStatus.InProgress,
                            ApplicationInstallPhase.CopyingFile,
                            installPhaseDescription);
                        data = Encoding.ASCII.GetBytes(string.Format("\r\n--{0}\r\n", boundaryString));
                        dataStream.Write(data, 0, data.Length);
                        await CopyFileToRequestStream(
                            certificateFile, 
                            dataStream);
                    }

                    // Close the installation request data.
                    data = Encoding.ASCII.GetBytes(string.Format("\r\n--{0}--\r\n", boundaryString));
                    dataStream.Write(data, 0, data.Length);

                    dataStream.Position = 0;

                    string contentType = string.Format("multipart/form-data; boundary={0}", boundaryString);

                    // Make the HTTP request.
                    await this.PostAsync(uri, dataStream, contentType);
                }

                    // Poll the status until complete.
                    ApplicationInstallStatus status = ApplicationInstallStatus.InProgress;
                do
                {
                    installPhaseDescription = string.Format("Installing {0}", appName);
                    this.SendAppInstallStatus(
                        ApplicationInstallStatus.InProgress,
                        ApplicationInstallPhase.Installing,
                        installPhaseDescription);

                    await Task.Delay(TimeSpan.FromMilliseconds(stateCheckIntervalMs));

                    status = await this.GetInstallStatusAsync().ConfigureAwait(false);
                }
                while (status == ApplicationInstallStatus.InProgress);

                installPhaseDescription = string.Format("{0} installed successfully", appName);
                this.SendAppInstallStatus(
                    ApplicationInstallStatus.Completed,
                    ApplicationInstallPhase.Idle,
                    installPhaseDescription);
            }
            catch (Exception e)
            {
                DevicePortalException dpe = e as DevicePortalException;

                if (dpe != null)
                {
                    this.SendAppInstallStatus(
                        ApplicationInstallStatus.Failed,
                        ApplicationInstallPhase.Idle,
                        string.Format("Failed to install {0}: {1}", appName, dpe.Reason));
                }
                else
                {
                    this.SendAppInstallStatus(
                        ApplicationInstallStatus.Failed,
                        ApplicationInstallPhase.Idle,
                        string.Format("Failed to install {0}: {1}", appName, installPhaseDescription));
                }
            }
        }