public MappingExpression(FluentMappingEngineContext <TSource, TTarget> mappingContext)
{
MappingContext = mappingContext;
}
protected AbstractTypeMapper(AbstractFluentMappingEngine engine)
{
//create a new context
MappingContext = new FluentMappingEngineContext <TSource, TTarget>(engine);
MapperId = Guid.NewGuid();
}