51Degrees Device Detection .NET  4.2

Device detection services for 51Degrees Pipeline


This example is available in full on GitHub.

Required NuGet Dependencies:

/* *********************************************************************
* This Original Work is copyright of 51 Degrees Mobile Experts Limited.
* Copyright 2019 51 Degrees Mobile Experts Limited, 5 Charlotte Close,
* Caversham, Reading, Berkshire, United Kingdom RG4 7BY.
* This Original Work is licensed under the European Union Public Licence (EUPL)
* v.1.2 and is subject to its terms as set out below.
* If a copy of the EUPL was not distributed with this file, You can obtain
* one at https://opensource.org/licenses/EUPL-1.2.
* The 'Compatible Licences' set out in the Appendix to the EUPL (as may be
* amended by the European Commission) shall be deemed incompatible for
* the purposes of the Work and the provisions of the compatibility
* clause in Article 5 of the EUPL shall not apply.
* If using the Work as, or as part of, a network application, by
* including the attribution notice(s) required under Article 5 of the EUPL
* in the end user terms of the application under an appropriate heading,
* such notice(s) shall fulfill the requirements of that article.
* ********************************************************************* */
using FiftyOne.Pipeline.Core.FlowElements;
using System;
public class Program
public class Example
private static string mobileUserAgent =
"Mozilla/5.0 (Linux; Android 9; SAMSUNG SM-G960U) " +
"AppleWebKit/537.36 (KHTML, like Gecko) SamsungBrowser/10.1 " +
"Chrome/71.0.3578.99 Mobile Safari/537.36";
private static string desktopUserAgent =
"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 " +
"(KHTML, like Gecko) Chrome/78.0.3904.108 Safari/537.36";
public void Run(string resourceKey)
// Build a new Pipeline with a cloud-based device detection engine.
using (var pipeline = new DeviceDetectionPipelineBuilder()
// Tell it that we want to use cloud and pass our resource key.
// First try a desktop User-Agent.
AnalyseUserAgent(desktopUserAgent, pipeline);
// Now try a mobile User-Agent.
AnalyseUserAgent(mobileUserAgent, pipeline);
static void AnalyseUserAgent(string userAgent, IPipeline pipeline)
// Create a new FlowData instance ready to be populated with evidence for the
// Pipeline.
using (var data = pipeline.CreateFlowData())
// Add a User-Agent string to the evidence collection.
data.AddEvidence(FiftyOne.Pipeline.Core.Constants.EVIDENCE_QUERY_USERAGENT_KEY, userAgent);
// Process the supplied evidence.
// Get device data from the flow data.
var device = data.Get<IDeviceData>();
Console.WriteLine($"Does the User-Agent '{userAgent}' " +
$"represent a mobile device?");
// Output the result of the 'IsMobile' property.
if (device.IsMobile.HasValue)
static void Main(string[] args)
// Obtain a resource key for free at https://configure.51degrees.com
// Make sure to include the 'IsMobile' property as it is used by this example.
string resourceKey = "!!YOUR_RESOURCE_KEY!!";
if (resourceKey.StartsWith("!!"))
Console.WriteLine("You need to create a resource key at " +
"https://configure.51degrees.com and paste it into the code, " +
"replacing !!YOUR_RESOURCE_KEY!!.");
Console.WriteLine("Make sure to include the 'IsMobile' " +
"property as it is used by this example.");
new Example().Run(resourceKey);
#if (DEBUG)
Console.WriteLine("Done. Press any key to exit.");