SearchResult result = service.search(new ItemSearchAdvanced()
{
	criteria = new ItemSearch()
	{
		pricingJoin = new PricingSearchBasic()
		{
			priceLevel = new SearchMultiSelectField()
			{
				searchValue = new RecordRef[] { new RecordRef() { internalId = "4" } },
				@operator = SearchMultiSelectFieldOperator.anyOf,
				operatorSpecified = true,
			},
			minimumQuantity = new SearchDoubleField()
			{
				searchValue = 0,
				searchValueSpecified = true,
				@operator = SearchDoubleFieldOperator.equalTo,
				operatorSpecified = true,
			}
		}
	},
	columns = new ItemSearchRow()
	{
		basic = new ItemSearchRowBasic()
		{
			itemId = new SearchColumnStringField[] { new SearchColumnStringField() },

		},
		pricingJoin = new PricingSearchRowBasic()
		{
			unitPrice = new SearchColumnDoubleField[] { new SearchColumnDoubleField() { } }
		},
	}
});