如何生成从搜索页模型查询所有非空属性的LINQ查询

public class SearchModel
{
    public string Title { get; set; }
    public string Description { get; set; }
    public int? CategoryId { get; set; }
    // 其他属性...
}

public class Program
{
    public static void Main()
    {
        var searchModels = new List<SearchModel>
        {
            new SearchModel { Title = "Example", CategoryId = 1 },
            new SearchModel { Description = "Another example" },
            // 其他数据...
        };

        var nonEmptyProperties = searchModels
            .SelectMany(model => model.GetType().GetProperties()
                .Where(prop => prop.GetValue(model) != null)
                .Select(prop => new
                {
                    PropertyName = prop.Name,
                    PropertyValue = prop.GetValue(model)
                }));

        foreach (var item in nonEmptyProperties)
        {
            Console.WriteLine($"Property: {item.PropertyName}, Value: {item.PropertyValue}");
        }
    }
}