MongoDB Query in VB.Net -

i can not vb.net connect mongodb replicaset - throws exceptions

dim mongo mongodbclient dim mgdb mongodatabase dim mgcol mongocollection(of bob)  public class bob    public property id objectid    public property name string end class  sub main()   try     mongo = new mongoclient("mongodb://ip:port,ip:port,ip:port/?replicaset=bob")     mgdb = mongo.getdatabase("test")     mscol = mgdb.collection(of bob)("test.me")      mgdb.getcollection("test.me").find(mongodb.driver.builders.query.exists("id"))  catch ex exception console.writeline(ex) end try end sub 

i don't know how i'm supposed query via vb .net?

i got work

dim _client imongoclient dim _db imongodatabase  sub main()     system.console.writeline("hi, bob!!")      try          _client = new mongoclient("mongodb://mongoone:27020,mongotwo:27021,mongothree:27020/?replicaset=bob")         _db = _client.getdatabase("test")          dim mgcol = _db.getcollection(of bob)("test.me")         dim mybob bob         mybob = new bob         mybob.name = "sam6"         mybob.id = objectid.generatenewid          'mgcol.insertone(mybob)          getsomedata().wait()         'getdatabyfilterextists().wait()         'getmetacardspectrum().wait()         getmetacardspectrumobj().wait()      catch ex exception         console.writeline(ex)     end try   end sub