Add more property implementations.

Source/MQTTnet/Packets/MqttConnectPacket.cs

@@ -24,7 +24,7 @@ namespace MQTTnet.Packets
 
         public MqttApplicationMessage WillMessage { get; set; }
 
-        public List<Property> Properties { get; set; }
+        public List<IProperty> Properties { get; set; }
 
         public override string ToString()
         {

Source/MQTTnet/Packets/Properties/AssignedClientIdentifierProperty.cs

@@ -0,0 +1,10 @@
+namespace MQTTnet.Packets.Properties
+{
+    public class AssignedClientIdentifierProperty : StringProperty
+    {
+        public AssignedClientIdentifierProperty(string value) 
+            : base((byte)PropertyID.AssignedClientIdentifer, value)
+        {
+        }
+    }
+}

Source/MQTTnet/Packets/Properties/AuthenticationDataProperty.cs

@@ -0,0 +1,12 @@
+using System;
+
+namespace MQTTnet.Packets.Properties
+{
+    public class AuthenticationDataProperty : BinaryDataProperty
+    {
+        public AuthenticationDataProperty(ArraySegment<byte> data) 
+            : base((byte)PropertyID.AuthenticationData, data)
+        {
+        }
+    }
+}

Source/MQTTnet/Packets/Properties/AuthenticationMethodProperty.cs

@@ -0,0 +1,10 @@
+namespace MQTTnet.Packets.Properties
+{
+    public class AuthenticationMethodProperty : StringProperty
+    {
+        public AuthenticationMethodProperty(string value) 
+            : base((byte)PropertyID.AuthenticationMethod, value)
+        {
+        }
+    }
+}

Source/MQTTnet/Packets/Properties/BaseTypes/BinaryDataProperty.cs

@@ -0,0 +1,31 @@
+using System;
+using MQTTnet.Serializer;
+
+namespace MQTTnet.Packets.Properties
+{
+    public class BinaryDataProperty : IProperty
+    {
+        public BinaryDataProperty(byte id, ArraySegment<byte> data)
+        {
+            if (data.Array == null)
+            {
+                throw new ArgumentNullException(nameof(data));
+            }
+
+            Id = id;
+            Data = data;
+        }
+
+        public byte Id { get; }
+
+        public ArraySegment<byte> Data { get; }
+
+        public void WriteTo(MqttPacketWriter writer)
+        {
+            if (writer == null) throw new ArgumentNullException(nameof(writer));
+
+            writer.Write((ushort)Data.Count);
+            writer.Write(Data);
+        }
+    }
+}

Source/MQTTnet/Packets/Properties/BaseTypes/ByteProperty.cs

@@ -3,13 +3,16 @@ using MQTTnet.Serializer;
 
 namespace MQTTnet.Packets.Properties
 {
-    public class ByteValue : IPropertyValue
+    public class ByteProperty : IProperty
     {
-        public ByteValue(byte value)
+        public ByteProperty(byte id, byte value)
         {
+            Id = id;
             Value = value;
         }
 
+        public byte Id { get; }
+
         public byte Value { get; }
 
         public void WriteTo(MqttPacketWriter writer)

Source/MQTTnet/Packets/Properties/BaseTypes/FourByteIntegerProperty.cs

@@ -0,0 +1,27 @@
+using System;
+using MQTTnet.Serializer;
+
+namespace MQTTnet.Packets.Properties.BaseTypes
+{
+    public class FourByteIntegerValue : IProperty
+    {
+        public FourByteIntegerValue(byte id, uint value)
+        {
+            Id = id;
+            Value = value;
+        }
+
+        public byte Id { get; }
+
+        public uint Value { get; }
+
+        public void WriteTo(MqttPacketWriter writer)
+        {
+            if (writer == null) throw new ArgumentNullException(nameof(writer));
+
+            // TODO: Check if order must be reversed like for ushort.
+            var bytes = BitConverter.GetBytes(Value);
+            writer.Write(bytes, 0, bytes.Length);
+        }
+    }
+}

Source/MQTTnet/Packets/Properties/BaseTypes/StringProperty.cs

@@ -3,13 +3,16 @@ using MQTTnet.Serializer;
 
 namespace MQTTnet.Packets.Properties
 {
-    public class StringValue : IPropertyValue
+    public class StringProperty : IProperty
     {
-        public StringValue(string value)
+        public StringProperty(byte id, string value)
         {
+            Id = id;
             Value = value;
         }
 
+        public byte Id { get; }
+
         public string Value { get; }
 
         public void WriteTo(MqttPacketWriter writer)

Source/MQTTnet/Packets/Properties/BaseTypes/TwoByteIntegerProperty.cs

@@ -1,22 +1,25 @@
 using System;
 using MQTTnet.Serializer;
 
-namespace MQTTnet.Packets.Properties
+namespace MQTTnet.Packets.Properties.BaseTypes
 {
-    public class TwoByteIntegerValue : IPropertyValue
+    public class TwoByteIntegerProperty : IProperty
     {
-        public TwoByteIntegerValue(ushort value)
+        public TwoByteIntegerProperty(byte id, ushort value)
         {
+            Id = id;
             Value = value;
         }
 
+        public byte Id { get; }
+
         public ushort Value { get; }
 
         public void WriteTo(MqttPacketWriter writer)
         {
             if (writer == null) throw new ArgumentNullException(nameof(writer));
 
-            throw new NotImplementedException();
+            writer.Write(Value);
         }
     }
 }

Source/MQTTnet/Packets/Properties/BaseTypes/VariableByteIntegerProperty.cs

@@ -0,0 +1,26 @@
+using System;
+using MQTTnet.Serializer;
+
+namespace MQTTnet.Packets.Properties.BaseTypes
+{
+    public class VariableByteIntegerProperty : IProperty
+    {
+        public VariableByteIntegerProperty(byte id, uint value)
+        {
+            Id = id;
+            Value = value;
+        }
+
+        public byte Id { get; }
+
+        public uint Value { get; }
+
+        public void WriteTo(MqttPacketWriter writer)
+        {
+            if (writer == null) throw new ArgumentNullException(nameof(writer));
+
+            var buffer = MqttPacketWriter.EncodeVariableByteInteger(Value);
+            writer.Write(buffer);
+        }
+    }
+}

Source/MQTTnet/Packets/Properties/ContentTypeProperty.cs

@@ -0,0 +1,10 @@
+namespace MQTTnet.Packets.Properties
+{
+    public class ContentTypeProperty : StringProperty
+    {
+        public ContentTypeProperty(string value) 
+            : base((byte)PropertyID.ContentType, value)
+        {
+        }
+    }
+}

Source/MQTTnet/Packets/Properties/CorrelationDataProperty.cs

@@ -0,0 +1,12 @@
+using System;
+
+namespace MQTTnet.Packets.Properties
+{
+    public class CorrelationDataProperty : BinaryDataProperty
+    {
+        public CorrelationDataProperty(ArraySegment<byte> data) 
+            : base((byte)PropertyID.CorrelationData, data)
+        {
+        }
+    }
+}

Source/MQTTnet/Packets/Properties/IProperty.cs

@@ -2,8 +2,10 @@
 
 namespace MQTTnet.Packets.Properties
 {
-    public interface IPropertyValue
+    public interface IProperty
     {
+        byte Id { get; }
+
         void WriteTo(MqttPacketWriter writer);
     }
 }

Source/MQTTnet/Packets/Properties/MessageExpiryIntervalProperty.cs

@@ -0,0 +1,12 @@
+using MQTTnet.Packets.Properties.BaseTypes;
+
+namespace MQTTnet.Packets.Properties
+{
+    public class MessageExpiryIntervalProperty : FourByteIntegerValue
+    {
+        public MessageExpiryInterval(uint value) 
+            : base((byte)PropertyID.MessageExpiryInterval, value)
+        {
+        }
+    }
+}

Source/MQTTnet/Packets/Properties/PayloadFormatIndicatorProperty.cs

@@ -0,0 +1,10 @@
+namespace MQTTnet.Packets.Properties
+{
+    public class PayloadFormatIndicatorProperty : ByteProperty
+    {
+        public PayloadFormatIndicatorProperty(byte value) 
+            : base((byte)PropertyID.PayloadFormatIndicator, value)
+        {
+        }
+    }
+}

Source/MQTTnet/Packets/Properties/Property.cs

@@ -1,9 +0,0 @@
-namespace MQTTnet.Packets.Properties
-{
-    public class Property
-    {
-        public PropertyType Type { get; set; }
-
-        public IPropertyValue Value { get; set; }
-    }
-}

Source/MQTTnet/Packets/Properties/PropertyID.cs

@@ -1,6 +1,6 @@
 namespace MQTTnet.Packets.Properties
 {
-    public enum PropertyType
+    public enum PropertyID
     {
         PayloadFormatIndicator = 1,
         MessageExpiryInterval = 2,

Source/MQTTnet/Packets/Properties/RequestProblemInformationProperty.cs

@@ -0,0 +1,10 @@
+namespace MQTTnet.Packets.Properties
+{
+    public class RequestProblemInformationProperty : ByteProperty
+    {
+        public RequestProblemInformationProperty(byte value) 
+            : base((byte)PropertyID.RequestProblemInformation, value)
+        {
+        }
+    }
+}

Source/MQTTnet/Packets/Properties/RequestResponseInformationProperty.cs

@@ -0,0 +1,10 @@
+namespace MQTTnet.Packets.Properties
+{
+    public class RequestResponseInformationProperty : ByteProperty
+    {
+        public RequestResponseInformationProperty(byte value) 
+            : base((byte)PropertyID.RequestResponseInformation, value)
+        {
+        }
+    }
+}

Source/MQTTnet/Packets/Properties/ResponseTopicProperty.cs

@@ -0,0 +1,10 @@
+namespace MQTTnet.Packets.Properties
+{
+    public class ResponseTopicProperty : StringProperty
+    {
+        public ResponseTopicProperty(string value) 
+            : base((byte)PropertyID.ResponseTopic, value)
+        {
+        }
+    }
+}

Source/MQTTnet/Packets/Properties/ServerKeepAliveProperty.cs

@@ -0,0 +1,12 @@
+using MQTTnet.Packets.Properties.BaseTypes;
+
+namespace MQTTnet.Packets.Properties
+{
+    public class ServerKeepAliveProperty : TwoByteIntegerProperty
+    {
+        public ServerKeepAliveProperty(ushort value) 
+            : base((byte)PropertyID.ServerKeepAlive, value)
+        {
+        }
+    }
+}

Source/MQTTnet/Packets/Properties/SessionExpiryIntervalProperty.cs

@@ -0,0 +1,12 @@
+using MQTTnet.Packets.Properties.BaseTypes;
+
+namespace MQTTnet.Packets.Properties
+{
+    public class SessionExpiryIntervalProperty : FourByteIntegerValue
+    {
+        public SessionExpiryIntervalProperty(uint value) 
+            : base((byte)PropertyID.SessionExpiryInterval, value)
+        {
+        }
+    }
+}

Source/MQTTnet/Packets/Properties/SubscriptionIdentifierProperty.cs

@@ -0,0 +1,12 @@
+using MQTTnet.Packets.Properties.BaseTypes;
+
+namespace MQTTnet.Packets.Properties
+{
+    public class SubscriptionIdentifierProperty : VariableByteIntegerProperty
+    {
+        public SubscriptionIdentifierProperty(uint value) 
+            : base((byte)PropertyID.SubscriptionIdentifier, value)
+        {
+        }
+    }
+}

Source/MQTTnet/Packets/Properties/WillDelayIntervalProperty.cs

@@ -0,0 +1,12 @@
+using MQTTnet.Packets.Properties.BaseTypes;
+
+namespace MQTTnet.Packets.Properties
+{
+    public class WillDelayIntervalProperty : FourByteIntegerValue
+    {
+        public WillDelayIntervalProperty(uint value) 
+            : base((byte)PropertyID.WillDelayInterval, value)
+        {
+        }
+    }
+}

Source/MQTTnet/Serializer/MqttPacketWriter.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Runtime.CompilerServices;
 using System.Text;
 using MQTTnet.Protocol;
 
@@ -27,7 +28,7 @@ namespace MQTTnet.Serializer
             return (byte)fixedHeader;
         }
 
-        public static ArraySegment<byte> EncodeVariableByteInteger(int value)
+        public static ArraySegment<byte> EncodeVariableByteInteger(uint value)
         {
             if (value <= 0)
             {
@@ -54,7 +55,7 @@ namespace MQTTnet.Serializer
             return new ArraySegment<byte>(buffer, 0, bufferOffset);
         }
 
-        public void WriteVariableLengthInteger(int value)
+        public void WriteVariableLengthInteger(uint value)
         {
             Write(EncodeVariableByteInteger(value));
         }
@@ -146,6 +147,7 @@ namespace MQTTnet.Serializer
             Array.Resize(ref _buffer, MaxBufferSize);
         }
 
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
         private void EnsureAdditionalCapacity(int additionalCapacity)
         {
             var freeSpace = _buffer.Length - _position;
@@ -157,6 +159,7 @@ namespace MQTTnet.Serializer
             EnsureCapacity(_buffer.Length + additionalCapacity - freeSpace);
         }
 
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
         private void EnsureCapacity(int capacity)
         {
             var newBufferLength = _buffer.Length;
@@ -174,6 +177,7 @@ namespace MQTTnet.Serializer
             Array.Resize(ref _buffer, newBufferLength);
         }
 
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
         private void IncreasePostition(int length)
         {
             _position += length;

Source/MQTTnet/Serializer/MqttV310PacketSerializer.cs

@@ -23,7 +23,7 @@ namespace MQTTnet.Serializer
             _packetWriter.Seek(5);
 
             var fixedHeader = SerializePacket(packet, _packetWriter);
-            var remainingLength = _packetWriter.Length - 5;
+            var remainingLength = (uint)(_packetWriter.Length - 5);
 
             var remainingLengthBuffer = MqttPacketWriter.EncodeVariableByteInteger(remainingLength);
 

Source/MQTTnet/Serializer/MqttV500PacketSerializer.cs

@@ -82,11 +82,11 @@ namespace MQTTnet.Serializer
                 var propertyWriter = new MqttPacketWriter();
                 foreach (var property in packet.Properties)
                 {
-                    propertyWriter.Write((byte)property.Key);
+                    propertyWriter.Write(property.Id);
-                    property.Value.WriteTo(propertyWriter);
+                    property.WriteTo(propertyWriter);
                 }
 
-                packetWriter.WriteVariableLengthInteger(propertyWriter.Length);
+                packetWriter.WriteVariableLengthInteger((uint)propertyWriter.Length);
                 packetWriter.Write(propertyWriter);
             }