Adding support for .NET 8.0 LTS, renaming private fields to start with underscore

AMWD.Common.EntityFrameworkCore/Exceptions/DatabaseProviderException.cs

@@ -33,6 +33,8 @@ namespace System
 			: base(message, innerException)
 		{ }
 
+#if NET6_0
+
 		/// <summary>
 		/// Initializes a new instance of the <see cref="DatabaseProviderException"/> class with serialized data.
 		/// </summary>
@@ -43,5 +45,7 @@ namespace System
 		protected DatabaseProviderException(SerializationInfo info, StreamingContext context)
 			: base(info, context)
 		{ }
+
+#endif
 	}
 }