Getting timeout exception in ASP.NET core web api while connecting with mongodb

See more:

C#

MongoDB

WebAPI

ASP.NET-Core

I have created mongo db and trying to call collection in asp.net core web api
i am getting the below exception

A timeout occurred after 30000ms selecting a server using CompositeServerSelector{ Selectors = MongoDB.Driver.MongoClient+AreSessionsSupportedServerSelector, LatencyLimitingServerSelector{ AllowedLatencyRange = 00:00:00.0150000 } }. Client view of cluster state is { ClusterId : "1", ConnectionMode : "ReplicaSet", Type : "ReplicaSet", State : "Disconnected", Servers : [] }.

Could you please assist how to get mongodb collection documents by id or any field the mapping class is ready to map that document data.

What I have tried:

I have tried with the below code which is working in Robot3t
<pre>        string ConnectionString = "mongodb+srv://myadmin:ChekTesting@123@clus12-srd123-878-87.filik54so.mongodb.net/MyDataBase?connect=replicaSet&connectTimeoutMS=60000&socketTimeoutMS=60000";

public  ServiceResponse GetUserServiceDetails(string userId)
        {

             ServiceResponse obj ServiceResponse = new  ServiceResponse();

            try
            {
                List<UserServiceViewModel> objUserServiceViewModel = new List<UserServiceViewModel>();
                var mongoClient = new MongoClient(ConnectionString);
                var rdgvr4uDatabase = mongoClient.GetDatabase("MyDatabase");
                var userServiceCollection = rdgvr4uDatabase.GetCollection<UserServiceViewModel>("UserServiceCollection");
                object datId = new ObjectId("605653cde5d0452fabd47b24");
                objUserServiceViewModel = userServiceCollection.Find(us => us._id == datId).ToList();
            }
            catch (Exception ex)
            {
                obj ServiceResponse.ErrorCode = 1;
                obj ServiceResponse.ErrorMessage = ex.Message;
            }
            return obj ServiceResponse;
        }

Could you please assist on this how to call mongodb documents in webapi. Did i missed any thing is required in asp.net core