var query = new QueryParameters { ReturnGeometry = true, ReturnFields = new[] {"attribute1", "attribute2", "attribute3"} };
var result = await featureLayer.QueryFeaturesAsync(query);
var query = new QueryParameters { ReturnGeometry = true, OutSpatialReference = SpatialReferences.WebMercator };
var result = await featureLayer.QueryFeaturesAsync(query);
注意:这可能会影响性能,并且不是推荐的做法。最好的方法是指定要返回的属性列表。