New MongoClient(): Method not found

[Winnie_Pooh]

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MongoDB c# Driver for NET Framework 4.5?

How can I use MongoDB c# Driver for an assembly using NET 4.5?

I have rolled back to the 2.13 version but on call (which worked in 2.14) I have received:
public string connectionString = “mongodb://localhost:27017”;
var dbClient = new MongoClient(connectionString);

Method not found: ‘MongoDB.Driver.Core.Configuration.ClusterSettings MongoDB.Driver.Core.Configuration.ClusterSettings.With(MongoDB.Driver.Optional1<MongoDB.Driver.Core.Clusters.ClusterConnectionMode>, MongoDB.Driver.Optional1<MongoDB.Driver.Core.Clusters.ConnectionModeSwitch>, MongoDB.Driver.Optional1<System.Nullable1>, MongoDB.Driver.Optional1<System.Collections.Generic.IEnumerable1<System.Net.EndPoint>>, MongoDB.Driver.Optional1<System.Collections.Generic.IReadOnlyDictionary2<System.String,System.Collections.Generic.IReadOnlyDictionary2<System.String,System.Object>>>, MongoDB.Driver.Optional1, MongoDB.Driver.Optional1<System.TimeSpan>, MongoDB.Driver.Optional1, MongoDB.Driver.Optional1<System.String>, MongoDB.Driver.Optional1<MongoDB.Driver.ServerApi>, MongoDB.Driver.Optional1<System.TimeSpan>, MongoDB.Driver.Optional1<MongoDB.Driver.Core.Clusters.ServerSelectors.IServerSelector>, MongoDB.Driver.Optional1<MongoDB.Driver.Core.Clusters.ServerSelectors.IServerSelector>, MongoDB.Driver.Optional1<System.Collections.Generic.IReadOnlyDictionary2<System.String,MongoDB.Bson.BsonDocument>>, MongoDB.Driver.Optional1<MongoDB.Driver.Core.Configuration.ConnectionStringScheme>)’.