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将动态WHERE子句组装到LINQ语句的最佳方法是什么？

我在表单上有几十个复选框,并将它们传递回:Dictionary <string,List <string >>(Dictionary <fieldName,List <values >>)到我的LINQ查询.

public IOrderedQueryable<ProductDetail> GetProductList(string productGroupName, string productTypeName, Dictionary<string,List<string>> filterDictionary)
{
    var q = from c in db.ProductDetail
            where c.ProductGroupName == productGroupName && c.ProductTypeName == productTypeName
            // insert dynamic filter here
            orderby c.ProductTypeName
            select c;
    return q;
}