GeoCoordinate.Unknown Field

.NET Framework 4.6 and 4.5

Represents a GeoCoordinate object that has unknown latitude and longitude fields.

Namespace:  System.Device.Location
Assembly:  System.Device (in System.Device.dll)

public static readonly GeoCoordinate Unknown

The IsUnknown property can be used to verify whether a GeoCoordinate contains no data.

The following code example verifies whether the GeoCoordinate that corresponds to a location is Unknown before printing out its latitude and longitude.

using System;
using System.Device.Location;

namespace GetLocationPropertyHandleUnknown
{
    class Program
    {
        static void Main(string[] args)
        {
            GetLocationPropertyHandleUnknown();
        }

        static void GetLocationPropertyHandleUnknown()
        {
            GeoCoordinateWatcher watcher = new GeoCoordinateWatcher();
            watcher.TryStart(false, TimeSpan.FromMilliseconds(1000));

            if (watcher.Position.Location.IsUnknown != true)
            {
                GeoCoordinate coord = watcher.Position.Location;

                Console.WriteLine("Lat: {0}, Long: {1}",
                    coord.Latitude,
                    coord.Longitude);
            }
            else
            {
                Console.WriteLine("Unknown");
            }

        }

    }
}

.NET Framework

Supported in: 4.6, 4.5, 4

.NET Framework Client Profile

Supported in: 4

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone Silverlight 8.1, Windows Phone Silverlight 8
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