public MongoDbContext(string connectionstring, string databasename, string jobcollection)
{
Client = new MongoClient(connectionstring);
DatabaseBase = Client.GetDatabase(databasename);
Students = DatabaseBase.GetCollection <StudentModel>("Users");
var indexModel = new CreateIndexModel <StudentModel>(Builders <StudentModel> .IndexKeys.Text(x => x.Tags));
Students.Indexes.CreateOne(indexModel);
Companies = DatabaseBase.GetCollection <CompanyModel>("Users");
Jobs = DatabaseBase.GetCollection <JobModel>(jobcollection);
}