Add project files.

Model/GpsLocation.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Runtime.Serialization;
+using System.Text;
+using System.Threading.Tasks;
+using System.Xml.Linq;
+
+namespace GpsClient2.Model {
+    [DataContract]
+    public class GpsLocation {
+        [DataMember(Name = "tag")]
+        public string Tag { get; set; }
+
+        [DataMember(Name = "device")]
+        public string Device { get; set; }
+
+        [DataMember(Name = "mode")]
+        public int Mode { get; set; }
+
+        [DataMember(Name = "time")]
+        public DateTime Time { get; set; }
+
+        [DataMember(Name = "ept")]
+        public float Ept { get; set; }
+
+        [DataMember(Name = "lat")]
+        public double Latitude { get; set; }
+
+        [DataMember(Name = "lon")]
+        public double Longitude { get; set; }
+
+        [DataMember(Name = "track")]
+        public float Track { get; set; }
+
+        [DataMember(Name = "speed")]
+        public float SpeedKnots { get; set; }
+
+        public double Speed => SpeedKnots * 1.852;
+
+        public override string ToString() {
+            return $"Tag: {Tag} - Device: {Device} - Mode: {Mode} - Time: {Time} - Latitude: {Latitude} - Longitude: {Longitude} - Track: {Track} - Speed: {Speed}";
+        }
+    }
+}