gistfile1.txt

  	public static IMappingExpression<TSource, TDestination> IgnoreAllNonExisting<TSource, TDestination>(this IMappingExpression<TSource, TDestination> expression)
		{
			var sourceType = typeof(TSource);
			var destinationType = typeof(TDestination);
			var existingMaps = Mapper.GetAllTypeMaps();
                
            var first = existingMaps.First(x => x.SourceType == sourceType && x.DestinationType == destinationType);

            foreach (var property in first.GetUnmappedPropertyNames())
			{
				expression.ForMember(property, opt => opt.Ignore());
			}

			return expression;
		}