Use static classes.

Author: bgrainger

src/MySqlConnector/Core/ResultSet.cs

@@ -85,7 +85,7 @@ public async Task<ResultSet> ReadResultSetHeaderAsync(IOBehavior ioBehavior)
 							ReadResultSetHeaderException = new MySqlException("Error during LOAD DATA LOCAL INFILE", ex);
 						}
 
-						await Session.SendReplyAsync(EmptyPayload.Create(), ioBehavior, CancellationToken.None).ConfigureAwait(false);
+						await Session.SendReplyAsync(EmptyPayload.Instance, ioBehavior, CancellationToken.None).ConfigureAwait(false);
 					}
 					else
 					{

src/MySqlConnector/Protocol/Payloads/ChangeUserPayload.cs

@@ -2,7 +2,7 @@
 
 namespace MySqlConnector.Protocol.Payloads
 {
-	internal sealed class ChangeUserPayload
+	internal static class ChangeUserPayload
 	{
 		public static PayloadData Create(string user, byte[] authResponse, string schemaName, byte[] connectionAttributes)
 		{

src/MySqlConnector/Protocol/Payloads/EmptyPayload.cs

@@ -1,12 +1,7 @@
-using System;
-
 namespace MySqlConnector.Protocol.Payloads
 {
-    internal sealed class EmptyPayload
-    {
-        public static PayloadData Create()
-        {
-            return new PayloadData(new byte[0]);
-        }
-    }
+	internal static class EmptyPayload
+	{
+		public static PayloadData Instance { get; } = new PayloadData(new byte[0]);
+	}
 }

src/MySqlConnector/Protocol/Payloads/HandshakeResponse41Payload.cs

@@ -3,7 +3,7 @@
 
 namespace MySqlConnector.Protocol.Payloads
 {
-	internal sealed class HandshakeResponse41Payload
+	internal static class HandshakeResponse41Payload
 	{
 		private static ByteBufferWriter CreateCapabilitiesPayload(ProtocolCapabilities serverCapabilities, ConnectionSettings cs, bool useCompression, ProtocolCapabilities additionalCapabilities=0)
 		{

src/MySqlConnector/Protocol/Payloads/InitDatabasePayload.cs

@@ -2,7 +2,7 @@
 
 namespace MySqlConnector.Protocol.Payloads
 {
-	internal sealed class InitDatabasePayload
+	internal static class InitDatabasePayload
 	{
 		public static PayloadData Create(string databaseName)
 		{

src/MySqlConnector/Protocol/Payloads/PingPayload.cs

@@ -1,6 +1,6 @@
 namespace MySqlConnector.Protocol.Payloads
 {
-	internal sealed class PingPayload
+	internal static class PingPayload
 	{
 		public static PayloadData Instance { get; } = new PayloadData(new[] { (byte) CommandKind.Ping });
 	}

src/MySqlConnector/Protocol/Payloads/QueryPayload.cs

@@ -2,7 +2,7 @@
 
 namespace MySqlConnector.Protocol.Payloads
 {
-	internal sealed class QueryPayload
+	internal static class QueryPayload
 	{
 		public static PayloadData Create(string query)
 		{

src/MySqlConnector/Protocol/Payloads/QuitPayload.cs

@@ -1,6 +1,6 @@
 namespace MySqlConnector.Protocol.Payloads
 {
-	internal sealed class QuitPayload
+	internal static class QuitPayload
 	{
 		public static PayloadData Instance { get; } = new PayloadData(new[] { (byte) CommandKind.Quit });
 	}

src/MySqlConnector/Protocol/Payloads/ResetConnectionPayload.cs

@@ -1,6 +1,6 @@
 namespace MySqlConnector.Protocol.Payloads
 {
-	internal sealed class ResetConnectionPayload
+	internal static class ResetConnectionPayload
 	{
 		public static PayloadData Instance { get; } = new PayloadData(new[] { (byte) CommandKind.ResetConnection });
 	}