/// <summary>
/// Finds the first document in the collection that satisfies the query criteria.
/// </summary>
/// <param name="filter">
/// A document describing the find criteria using <see href="https://docs.mongodb.com/manual/reference/operator/query/">query operators</see>.
/// If not specified, all documents in the collection will match the request.
/// </param>
/// <param name="sort">A document describing the sort criteria. If not specified, the order of the returned documents is not guaranteed.</param>
/// <param name="projection">
/// A document describing the fields to return for all matching documents. If not specified, all fields are returned.
/// </param>
/// <returns>
/// An awaitable <see cref="Task{T}"/> representing the remote find one operation. The result of the task is the first document that matches the find criteria.
/// </returns>
/// <seealso href="https://docs.mongodb.com/manual/reference/method/db.collection.findOne/"/>
public async Task <TDocument> FindOneAsync(object filter = null, object sort = null, object projection = null)
{
var result = await _handle.FindOne(filter?.ToNativeJson(), FindAndModifyOptions.Find(projection, sort));
return(result.GetValue <TDocument>());
}
