public bool MappingNotDefinedFor <TSource, TDestination>(string unseparatedParameters) { var propertyMapping = GetPropertyMapping <TSource, TDestination>(); if (propertyMapping is null) { return(true); } var propertiesNames = properties.GetPropertiesNamesFrom(unseparatedParameters); foreach (var name in propertiesNames) { if (!propertyMapping.ContainsKey(name)) { return(true); } } return(false); }