diff --git a/OpenRA.Game/Network/Connection.cs b/OpenRA.Game/Network/Connection.cs
index d37429b346..fd0d59319a 100644
--- a/OpenRA.Game/Network/Connection.cs
+++ b/OpenRA.Game/Network/Connection.cs
@@ -260,14 +260,14 @@ namespace OpenRA.Network
 			try
 			{
 				var ms = new MemoryStream();
-				ms.WriteArray(BitConverter.GetBytes(packet.Length));
+				ms.Write(packet.Length);
 				ms.WriteArray(packet);
 
 				foreach (var s in queuedSyncPackets)
 				{
 					var q = OrderIO.SerializeSync(s);
 
-					ms.WriteArray(BitConverter.GetBytes(q.Length));
+					ms.Write(q.Length);
 					ms.WriteArray(q);
 
 					sentSync.Enqueue(s);
diff --git a/OpenRA.Game/Network/GameSave.cs b/OpenRA.Game/Network/GameSave.cs
index cc3eae5032..f549878070 100644
--- a/OpenRA.Game/Network/GameSave.cs
+++ b/OpenRA.Game/Network/GameSave.cs
@@ -226,9 +226,9 @@ namespace OpenRA.Network
 				clientSlot = firstBotSlotIndex;
 			}
 
-			ordersStream.WriteArray(BitConverter.GetBytes(data.Length + 8));
-			ordersStream.WriteArray(BitConverter.GetBytes(frame));
-			ordersStream.WriteArray(BitConverter.GetBytes(clientSlot));
+			ordersStream.Write(data.Length + 8);
+			ordersStream.Write(frame);
+			ordersStream.Write(clientSlot);
 			ordersStream.WriteArray(data);
 			LastOrdersFrame = frame;
 		}
@@ -288,9 +288,9 @@ namespace OpenRA.Network
 			{
 				ordersStream.Seek(0, SeekOrigin.Begin);
 				ordersStream.CopyTo(file);
-				file.Write(BitConverter.GetBytes(MetadataMarker), 0, 4);
-				file.Write(BitConverter.GetBytes(LastOrdersFrame), 0, 4);
-				file.Write(BitConverter.GetBytes(LastSyncFrame), 0, 4);
+				file.Write(MetadataMarker);
+				file.Write(LastOrdersFrame);
+				file.Write(LastSyncFrame);
 				file.Write(lastSyncPacket, 0, Order.SyncHashOrderLength);
 
 				var globalSettingsNodes = new List<MiniYamlNode>() { GlobalSettings.Serialize() };
@@ -307,16 +307,16 @@ namespace OpenRA.Network
 				file.WriteString(Encoding.UTF8, slotClientNodes.WriteToString());
 
 				var traitDataOffset = file.Length;
-				file.Write(BitConverter.GetBytes(TraitDataMarker), 0, 4);
+				file.Write(TraitDataMarker);
 
 				var traitDataNodes = TraitData
 					.Select(kv => new MiniYamlNode(kv.Key.ToStringInvariant(), kv.Value))
 					.ToList();
 				file.WriteString(Encoding.UTF8, traitDataNodes.WriteToString());
 
-				file.Write(BitConverter.GetBytes(ordersStream.Length), 0, 4);
-				file.Write(BitConverter.GetBytes(traitDataOffset), 0, 4);
-				file.Write(BitConverter.GetBytes(EOFMarker), 0, 4);
+				file.Write((int)ordersStream.Length);
+				file.Write((int)traitDataOffset);
+				file.Write(EOFMarker);
 			}
 		}
 	}
diff --git a/OpenRA.Game/Network/OrderIO.cs b/OpenRA.Game/Network/OrderIO.cs
index dee56ab733..ee8e3933fb 100644
--- a/OpenRA.Game/Network/OrderIO.cs
+++ b/OpenRA.Game/Network/OrderIO.cs
@@ -55,7 +55,7 @@ namespace OpenRA.Network
 		public byte[] Serialize(int frame)
 		{
 			var ms = new MemoryStream((int)data.Length + 4);
-			ms.WriteArray(BitConverter.GetBytes(frame));
+			ms.Write(frame);
 
 			data.Position = 0;
 			data.CopyTo(ms);
@@ -83,9 +83,9 @@ namespace OpenRA.Network
 		public static byte[] SerializeSync((int Frame, int SyncHash, ulong DefeatState) data)
 		{
 			var ms = new MemoryStream(4 + Order.SyncHashOrderLength);
-			ms.WriteArray(BitConverter.GetBytes(data.Frame));
+			ms.Write(data.Frame);
 			ms.WriteByte((byte)OrderType.SyncHash);
-			ms.WriteArray(BitConverter.GetBytes(data.SyncHash));
+			ms.Write(data.SyncHash);
 			ms.WriteArray(BitConverter.GetBytes(data.DefeatState));
 			return ms.GetBuffer();
 		}
@@ -93,7 +93,7 @@ namespace OpenRA.Network
 		public static byte[] SerializePingResponse(long timestamp, byte queueLength)
 		{
 			var ms = new MemoryStream(14);
-			ms.WriteArray(BitConverter.GetBytes(0));
+			ms.Write(0);
 			ms.WriteByte((byte)OrderType.Ping);
 			ms.WriteArray(BitConverter.GetBytes(timestamp));
 			ms.WriteByte(queueLength);
diff --git a/OpenRA.Game/Network/ReplayRecorder.cs b/OpenRA.Game/Network/ReplayRecorder.cs
index b8949ea5cc..736d8cb09c 100644
--- a/OpenRA.Game/Network/ReplayRecorder.cs
+++ b/OpenRA.Game/Network/ReplayRecorder.cs
@@ -92,7 +92,7 @@ namespace OpenRA.Network
 		public void ReceiveFrame(int clientID, int frame, byte[] data)
 		{
 			var ms = new MemoryStream(4 + data.Length);
-			ms.WriteArray(BitConverter.GetBytes(frame));
+			ms.Write(frame);
 			ms.WriteArray(data);
 			Receive(clientID, ms.GetBuffer());
 		}
diff --git a/OpenRA.Game/Server/Connection.cs b/OpenRA.Game/Server/Connection.cs
index 2885c1f8ab..a34c040662 100644
--- a/OpenRA.Game/Server/Connection.cs
+++ b/OpenRA.Game/Server/Connection.cs
@@ -60,9 +60,9 @@ namespace OpenRA.Server
 		static byte[] CreatePingFrame()
 		{
 			var ms = new MemoryStream(21);
-			ms.WriteArray(BitConverter.GetBytes(13));
-			ms.WriteArray(BitConverter.GetBytes(0));
-			ms.WriteArray(BitConverter.GetBytes(0));
+			ms.Write(13);
+			ms.Write(0);
+			ms.Write(0);
 			ms.WriteByte((byte)OrderType.Ping);
 			ms.WriteArray(BitConverter.GetBytes(Game.RunTime));
 			return ms.GetBuffer();
diff --git a/OpenRA.Game/Server/Server.cs b/OpenRA.Game/Server/Server.cs
index eab0031b49..fadcabf443 100644
--- a/OpenRA.Game/Server/Server.cs
+++ b/OpenRA.Game/Server/Server.cs
@@ -436,8 +436,8 @@ namespace OpenRA.Server
 			{
 				// Send handshake and client index.
 				var ms = new MemoryStream(8);
-				ms.WriteArray(BitConverter.GetBytes(ProtocolVersion.Handshake));
-				ms.WriteArray(BitConverter.GetBytes(newConn.PlayerIndex));
+				ms.Write(ProtocolVersion.Handshake);
+				ms.Write(newConn.PlayerIndex);
 				newConn.TrySendData(ms.ToArray());
 
 				// Dispatch a handshake order
@@ -704,9 +704,9 @@ namespace OpenRA.Server
 		static byte[] CreateFrame(int client, int frame, byte[] data)
 		{
 			var ms = new MemoryStream(data.Length + 12);
-			ms.WriteArray(BitConverter.GetBytes(data.Length + 4));
-			ms.WriteArray(BitConverter.GetBytes(client));
-			ms.WriteArray(BitConverter.GetBytes(frame));
+			ms.Write(data.Length + 4);
+			ms.Write(client);
+			ms.Write(frame);
 			ms.WriteArray(data);
 			return ms.GetBuffer();
 		}
@@ -714,9 +714,9 @@ namespace OpenRA.Server
 		static byte[] CreateAckFrame(int frame, byte count)
 		{
 			var ms = new MemoryStream(14);
-			ms.WriteArray(BitConverter.GetBytes(6));
-			ms.WriteArray(BitConverter.GetBytes(0));
-			ms.WriteArray(BitConverter.GetBytes(frame));
+			ms.Write(6);
+			ms.Write(0);
+			ms.Write(frame);
 			ms.WriteByte((byte)OrderType.Ack);
 			ms.WriteByte(count);
 			return ms.GetBuffer();
@@ -725,9 +725,9 @@ namespace OpenRA.Server
 		static byte[] CreateTickScaleFrame(float scale)
 		{
 			var ms = new MemoryStream(17);
-			ms.WriteArray(BitConverter.GetBytes(9));
-			ms.WriteArray(BitConverter.GetBytes(0));
-			ms.WriteArray(BitConverter.GetBytes(0));
+			ms.Write(9);
+			ms.Write(0);
+			ms.Write(0);
 			ms.WriteByte((byte)OrderType.TickScale);
 			ms.Write(scale);
 			return ms.GetBuffer();