Question

My document has a property that is of the type List<string>.
I want to return all documents from a collection where a set of strings match any item from this List<string> property.

I would like to construct this like the following question, but in C#:

MongoDB find where key equals string from array

I know this is off, but it’s my best attempt:

var queryItems = new List<QueryComplete>();
queryItems.Add(Query.EQ("PropertyName", "test"));
var query= Query.Or(queryItems.ToArray());
var qd = new QueryDocument(new BsonDocument { query.ToBsonDocument() });
var result = GetCollection<CollectionName>().FindAs<Type>(qd)

Answer 1

Looks like what you are looking for is described here:

ContainsAny

This method is used to test whether an array (or array-like) field or property contains any of the provided values.

var query =
    from c in collection.AsQueryable<C>()
    where c.A.ContainsAny(new[] { 1, 2, 3 })
    select c;
// or
var query =
    collection.AsQueryable<C>()
    .Where(c => c.A.ContainsAny(new[] { 1, 2, 3 }));