Add Ping command

PlantBox.Shared/Communication/Commands/CommandSerializable.cs

@@ -8,7 +8,7 @@ namespace PlantBox.Shared.Communication.Commands
     /// A class serializable to a <see cref="CommandPacket"/>
     /// </summary>
     /// <typeparam name="T"></typeparam>
-    public abstract class CommandSerializable<T>
+    public abstract class CommandSerializable<T> where T : new()
     {
         /// <summary>
         /// Serialize all the values in a string <see cref="Array"/>,

PlantBox.Shared/Communication/Commands/Ping.cs

@@ -0,0 +1,41 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace PlantBox.Shared.Communication.Commands
+{
+    public class Ping : CommandSerializable<Ping>
+    {
+        public string Message { get; set; }
+
+        public Ping()
+        {
+
+        }
+        public Ping(string message)
+        {
+            Message = message;
+        }
+
+        public override Ping Deserialize(string[] arguments)
+        {
+            if (arguments == null)
+            {
+                throw new ArgumentNullException(nameof(arguments));
+            }
+            if (arguments.Length < 1)
+            {
+                throw new ArgumentException($"Excepted at least 1 argument, got {arguments.Length}");
+            }
+
+            Message = arguments[0];
+
+            return this;
+        }
+
+        public override string[] Serialize()
+        {
+            return new string[] { Message };
+        }
+    }
+}