elasticsearch - Error using Object Initializer syntax to create MultiMatchQuery -

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i'm using nest 2.2.0 , trying build multimatch query follows:

var searchquery = new multimatchquery()  {     fields = field<product>(p=>p.skuname, 2),     query = "hello world" };

when run however, returns:

the non-generic type 'nest.field' cannot used type arguments.

i don't understand why i'm getting error, since i've more or less taken query straight documentation found @ https://www.elastic.co/guide/en/elasticsearch/client/net-api/2.x/multi-match-usage.html#_object_initializer_syntax_example_35.

in case matters, i've defined product follows:

[elasticsearchtype(name="product", idproperty="id")] public class product {     [nest.number(store = true)]     public int id {get;set;}      [string(name="name", store = true, index=fieldindexoption.analyzed)]     public string skuname { get; set; } }

is able help?

the field type you're looking nest.infer.field

var searchquery = new multimatchquery() {     fields = nest.infer.field<product>(p => p.skuname, 2),     query = "hello world" };  client.search<product>(new searchrequest { query = searchquery });

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