Add project files.

NmeaMessages/GprmcMessage.cs

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+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace GpsClient2.NmeaMessages {
+    public class GprmcMessage : NmeaMessage {
+        #region Description
+
+        //      $GPRMC,123519,A,4807.038,N,01131.000,E,022.4,084.4,230394,003.1,W*6A
+        //
+        //      Where:
+        //          RMC Recommended Minimum sentence C
+        //          123519       Fix taken at 12:35:19 UTC
+        //          A            Status A = active or V = Void.
+        //          4807.038, N   Latitude 48 deg 07.038' N
+        //          01131.000,E Longitude 11 deg 31.000' E
+        //          022.4        Speed over the ground in knots
+        //          084.4        Track angle in degrees True
+        //          230394       Date - 23rd of March 1994
+        //          003.1,W Magnetic Variation
+        //          *6A The checksum data, always begins with *
+
+        #endregion
+
+        #region Properties
+
+        public TimeSpan FixTime { get; set; }
+
+        /// <summary>
+        /// Status A = active or V = Void.
+        /// </summary>
+        public bool IsActive { get; set; }
+
+        public double Latitude { get; set; }
+
+        public double Longitude { get; set; }
+
+        /// <summary>
+        /// Speed over the ground in knots
+        /// </summary>
+        public float Speed { get; set; }
+
+        /// <summary>
+        /// Track angle in degrees True
+        /// </summary>
+        public float Course { get; set; }
+
+        /// <summary>
+        /// Date - 23rd of March 1994
+        /// </summary>
+        public DateTime UpdateDate { get; set; }
+
+        /// <summary>
+        /// Magnetic Variation
+        /// </summary>
+        public float MagneticVariation { get; set; }
+
+        /// <summary>
+        /// Magnetic Variation Unit
+        /// </summary>
+        public string MagneticVariationUnit { get; set; }
+
+        #endregion
+
+        #region Message parsing
+
+        public override void Parse(string[] messageParts) {
+            if (messageParts == null || messageParts.Length < 11) {
+                throw new ArgumentException("Invalid GPGGA message");
+            }
+            FixTime = messageParts[1].ToTimeSpan();
+            IsActive = messageParts[2].ToBoolean("A");
+            Latitude = messageParts[3].ToCoordinates(messageParts[4], CoordinateType.Latitude);
+            Longitude = messageParts[5].ToCoordinates(messageParts[6], CoordinateType.Longitude);
+            Speed = messageParts[7].ToFloat();
+            Course = messageParts[8].ToFloat();
+            UpdateDate = DateTime.ParseExact(messageParts[9], "ddMMyy", CultureInfo.InvariantCulture);
+            MagneticVariation = messageParts[10].ToFloat();
+            MagneticVariationUnit = messageParts[11];
+        }
+
+        #endregion
+
+        public override string ToString() {
+            return $"Latitude {Latitude} - Longitude {Longitude} - Speed {Speed}";
+        }
+    }
+}