c#代码怎么实现出这个json数组 写一个API接口 控制中实现 一个数组中有三条数据

{product:[{"id":1,"img":"https://images.unsplash.com/photo-1551334787-21e6bd3ab135?w=640","name":"f1"},
{"id":2,"img":"https://images.unsplash.com/photo-1551214012-84f95e060dee?w=640","name":"f2"},
{"id":3,"img":"https://images.unsplash.com/photo-1551446591-142875a901a1?w=640","name":"f3"}]}