Update to .NET 7.0 Preview 5.

Author: bgrainger

azure-pipelines.yml

@@ -1,5 +1,5 @@
 variables:
-  DotNetCoreSdkVersion: '7.0.100-preview.4.22252.9'
+  DotNetCoreSdkVersion: '7.0.100-preview.5.22307.18'
   NUGET_PACKAGES: '$(Pipeline.Workspace)/.nuget/packages'
 
 jobs:

src/MySqlConnector/Core/ServerSession.cs

@@ -1919,7 +1919,7 @@ protected override void OnStatementBegin(int index)
 		private readonly string m_sql;
 	}
 
-	private static ReadOnlySpan<byte> BeginCertificateBytes => "-----BEGIN CERTIFICATE-----";
+	private static ReadOnlySpan<byte> BeginCertificateBytes => "-----BEGIN CERTIFICATE-----"u8;
 	private static readonly IMySqlConnectorLogger Log = MySqlConnectorLogManager.CreateLogger(nameof(ServerSession));
 	private static readonly PayloadData s_setNamesUtf8NoAttributesPayload = QueryPayload.Create(false, "SET NAMES utf8;");
 	private static readonly PayloadData s_setNamesUtf8mb4NoAttributesPayload = QueryPayload.Create(false, "SET NAMES utf8mb4;");

src/MySqlConnector/Core/ServerVersion.cs

@@ -39,7 +39,7 @@ public ServerVersion(ReadOnlySpan<byte> versionString)
 		if (versionString is [ 0x2D, .. ])
 		{
 			versionString = versionString[1..];
-			ReadOnlySpan<byte> mariaDb = "-MariaDB";
+			ReadOnlySpan<byte> mariaDb = "-MariaDB"u8;
 			var mariaDbIndex = versionString.IndexOf(mariaDb);
 			if (mariaDbIndex != -1)
 			{

src/MySqlConnector/Core/SingleCommandPayloadCreator.cs

@@ -249,19 +249,19 @@ private static bool WriteCommand(IMySqlCommand command, ByteBufferWriter writer,
 		var isSingleRow = (command.CommandBehavior & CommandBehavior.SingleRow) != 0;
 		if (isSchemaOnly)
 		{
-			ReadOnlySpan<byte> setSqlSelectLimit0 = "SET sql_select_limit=0;\n";
+			ReadOnlySpan<byte> setSqlSelectLimit0 = "SET sql_select_limit=0;\n"u8;
 			writer.Write(setSqlSelectLimit0);
 		}
 		else if (isSingleRow)
 		{
-			ReadOnlySpan<byte> setSqlSelectLimit1 = "SET sql_select_limit=1;\n";
+			ReadOnlySpan<byte> setSqlSelectLimit1 = "SET sql_select_limit=1;\n"u8;
 			writer.Write(setSqlSelectLimit1);
 		}
 		var preparer = new StatementPreparer(command.CommandText!, command.RawParameters, command.CreateStatementPreparerOptions() | ((appendSemicolon || isSchemaOnly || isSingleRow) ? StatementPreparerOptions.AppendSemicolon : StatementPreparerOptions.None));
 		var isComplete = preparer.ParseAndBindParameters(writer);
 		if (isComplete && (isSchemaOnly || isSingleRow))
 		{
-			ReadOnlySpan<byte> clearSqlSelectLimit = "\nSET sql_select_limit=default;";
+			ReadOnlySpan<byte> clearSqlSelectLimit = "\nSET sql_select_limit=default;"u8;
 			writer.Write(clearSqlSelectLimit);
 		}
 		return isComplete;

src/MySqlConnector/MySqlBulkCopy.cs

@@ -448,7 +448,7 @@ static bool WriteValue(MySqlConnection connection, object value, ref int inputIn
 
 			if (value is null || value == DBNull.Value)
 			{
-				ReadOnlySpan<byte> escapedNull = @"\N"; // a field value of \N is read as NULL for input
+				ReadOnlySpan<byte> escapedNull = @"\N"u8; // a field value of \N is read as NULL for input
 				if (output.Length < escapedNull.Length)
 				{
 					bytesWritten = 0;
@@ -672,7 +672,7 @@ static bool WriteSubstring(string value, ref int inputIndex, ref Encoder? utf8En
 
 		static bool WriteBytes(ReadOnlySpan<byte> value, ref int inputIndex, Span<byte> output, out int bytesWritten)
 		{
-			ReadOnlySpan<byte> hex = "0123456789ABCDEF";
+			ReadOnlySpan<byte> hex = "0123456789ABCDEF"u8;
 			bytesWritten = 0;
 			for (; inputIndex < value.Length && output.Length > 2; inputIndex++)
 			{

src/MySqlConnector/MySqlParameter.cs

@@ -199,7 +199,7 @@ internal void AppendSqlString(ByteBufferWriter writer, StatementPreparerOptions
 
 		if (Value is null || Value == DBNull.Value)
 		{
-			ReadOnlySpan<byte> nullBytes = "NULL";
+			ReadOnlySpan<byte> nullBytes = "NULL"u8;
 			writer.Write(nullBytes);
 		}
 #if NET45
@@ -316,8 +316,8 @@ internal void AppendSqlString(ByteBufferWriter writer, StatementPreparerOptions
 		}
 		else if (Value is bool boolValue)
 		{
-			ReadOnlySpan<byte> trueBytes = "true";
-			ReadOnlySpan<byte> falseBytes = "false";
+			ReadOnlySpan<byte> trueBytes = "true"u8;
+			ReadOnlySpan<byte> falseBytes = "false"u8;
 			writer.Write(boolValue ? trueBytes : falseBytes);
 		}
 		else if (Value is float or double)
@@ -825,7 +825,7 @@ private static void WriteTime(ByteBufferWriter writer, TimeSpan timeSpan)
 		}
 	}
 
-	private static ReadOnlySpan<byte> BinaryBytes => "_binary'";
+	private static ReadOnlySpan<byte> BinaryBytes => "_binary'"u8;
 
 	private DbType m_dbType;
 	private MySqlDbType m_mySqlDbType;