Implement MySqlAttribute.Clone. Fixes #1169

Author: bgrainger

docs/content/api/MySqlConnector/MySqlAttribute/Clone.md

@@ -5,7 +5,7 @@ namespace MySqlConnector
 	/// </summary>
 	/// <remarks>See <a href="https://dev.mysql.com/doc/refman/8.0/en/query-attributes.html">Query Attributes</a> for information on using query attributes.</remarks>
 #pragma warning disable CA1711 // Identifiers should not have incorrect suffix
-	public sealed class MySqlAttribute
+	public sealed class MySqlAttribute : ICloneable
 #pragma warning restore CA1711 // Identifiers should not have incorrect suffix
 	{
 		/// <summary>
@@ -35,6 +35,13 @@ public MySqlAttribute(string attributeName, object? value)
 		/// </summary>
 		public object? Value { get; set; }
 
+		/// <summary>
+		/// Returns a new <see cref="MySqlAttribute"/> with the same property values as this instance.
+		/// </summary>
+		public MySqlAttribute Clone() => new MySqlAttribute(AttributeName, Value);
+
+		object ICloneable.Clone() => Clone();
+
 		internal MySqlParameter ToParameter()
 		{
 			if (string.IsNullOrEmpty(AttributeName))

docs/content/api/MySqlConnector/MySqlAttributeType.md

@@ -27,4 +27,14 @@ public void ConstructWithArguments()
 		Assert.Equal("name", attribute.AttributeName);
 		Assert.Equal("value", attribute.Value);
 	}
+
+	[Fact]
+	public void Clone()
+	{
+		var attribute = new MySqlAttribute("name", "value");
+		var clone = attribute.Clone();
+		Assert.NotSame(attribute, clone);
+		Assert.Equal(attribute.AttributeName, clone.AttributeName);
+		Assert.Equal(attribute.Value, clone.Value);
+	}
 }

src/MySqlConnector/MySqlAttribute.cs

@@ -32,7 +32,7 @@
   </ItemGroup>
 
   <ItemGroup Condition=" '$(Configuration)' == 'Baseline' ">
-    <PackageReference Include="MySql.Data" Version="8.0.28" />
+    <PackageReference Include="MySql.Data" Version="8.0.29" />
     <Compile Remove="ByteBufferWriterTests.cs;CachedProcedureTests.cs;CancellationTests.cs;ConnectionTests.cs;FakeMySqlServer.cs;FakeMySqlServerConnection.cs;LoadBalancerTests.cs;MySqlDecimalTests.cs;MySqlExceptionTests.cs;MySqlParameterCollectionNameToIndexTests.cs;NormalizeTests.cs;ServerVersionTests.cs;StatementPreparerTests.cs;TypeMapperTests.cs;UtilityTests.cs" />
   </ItemGroup>