parameter.Value =   parameter.Value is DBNull ? parameter.Value : parameter.Value.ToString().ApplyCorrectYeKe();

if (!(parameter.Value is DBNull) && parameter.Value is string)
{
   parameter.Value =  Convert.ToString(parameter.Value, CultureInfo.InvariantCulture).ApplyCorrectYeKe();
}

Install-Package mongocsharpdriver

  public class Author
    {
        public ObjectId Id { get; set; }
        public string Name { get; set; }
    }

public class Language
    {
        public ObjectId Id { get; set; }
        public string Name { get; set; }
    }

  public class Book
    {
        public ObjectId Id { get; set; }
        public string Title { get; set; }
        public string ISBN { get; set; }
        public int Price { get; set; }
        public List<Author> Authors { get; set; }
        public Language Language { get; set; }
    }

           var book =new Book()
           {
               Title = "Gone With Wind",
               ISBN = "43442424",
               Price = 50000,
               Language = new Language()
               {
                  Name = "Persian"
               },
               Authors = new List<Author>()
               {
                   new Author()
                   {
                       Name = "Margaret Mitchell"
                   },
                     new Author()
                   {
                       Name = "Ali Mahboobi (Translator)"
                   },
               }
           };

var client = new MongoClient();

 string connectionString = "mongodb://localhost:27017";
            MongoClientSettings settings = MongoClientSettings.FromUrl(new MongoUrl(connectionString));
            var client = new MongoClient(settings);

var db = client.GetDatabase("publisher");

var collection = db.GetCollection<Book>("books");

collection.InsertOneAsync(book);

       var client = new MongoClient();
            var db = client.GetDatabase("publisher");
            db.DropCollection("books");
            var collection = db.GetCollection<Book>("books");
            
            var book =new Book()
           {
               Title = "Gone With Wind",
               ISBN = "43442424",
               Price = 50000,
               Year = 1936,
               LastStock = DateTime.Now.AddDays(-13),
               Language = new Language()
               {
                  Name = "Persian"
               },
               Authors = new List<Author>()
               {
                   new Author()
                   {
                       Name = "Margaret Mitchell"
                   },
                     new Author()
                   {
                       Name = "Ali Mahboobi (Translator)"
                   },
               }
           };

            var book2 = new Book()
            {
                Title = "Jane Eyre",
                ISBN = "87897897",
                Price = 60000,
                Year = 1847,
                LastStock = DateTime.Now.AddDays(-5),
                Language = new Language()
                {
                    Name = "English"
                },
                Authors = new List<Author>()
               {
                   new Author()
                   {
                       Name = "Charlotte Brontë"
                   },
                   
               }
            };


            var book3 = new Book()
            {
                Title = "White Fang",
                ISBN = "43442424",
                Price = 50000,
                Year = 1936,
                LastStock = DateTime.Now.AddDays(-13),
                Language = new Language()
                {
                    Name = "English"
                },
                Authors = new List<Author>()
               {
                   new Author()
                   {
                       Name = "Jack London"
                   },
                     new Author()
                   {
                       Name = "Philippe Mignon"
                   },
               }
            };

            var book4 = new Book()
            {
                Title = "The Lost Symbol",
                ISBN = "43442424",
                Price = 3500000,
                Year = 2009,
                LastStock = DateTime.Now.AddDays(-17),
                Language = new Language()
                {
                    Name = "Persian"
                },
                Authors = new List<Author>()
               {
                   new Author()
                   {
                       Name = "Dan Brown"
                   },
                     new Author()
                   {
                       Name = "Mehrdad"
                   },
               }
            };

            var book7 = new Book()
            {
                Title = "The Lost Symbol",
                ISBN = "43442424",
                Price = 47000000,
                Year = 2009,
                LastStock = DateTime.Now.AddDays(-56),
                Language = new Language()
                {
                    Name = "Persian"
                },
                Authors = new List<Author>()
               {
                   new Author()
                   {
                       Name = "Dan Brown"
                   },
                     new Author()
                   {
                       Name = "Mehrdad"
                   },
               }
            };
            var book5= new Book()
            {
                Title = "The Help",
                ISBN = "45345e3er3",
                Price = 9000000,
                Year = 2009,
                LastStock = DateTime.Now.AddDays(-2),
                Language = new Language()
                {
                    Name = "Enlish"
                },
                Authors = new List<Author>()
               {
                   new Author()
                   {
                       Name = "Kathryn Stockett"
                   },
                    
               }
            };

            var book6 = new Book()
            {
                Title = "City of Glass",
                ISBN = "454534545",
                Price = 500000,
                Year = 2009,
                LastStock = DateTime.Now,
                Language = new Language()
                {
                    Name = "Persian"
                },
                Authors = new List<Author>()
               {
                   new Author()
                   {
                       Name = "Cassandra Clare"
                   },
                   new Author()
                   {
                       Name = "Ali"
                   },

               }
            };
            var books = new List<Book> {book, book2, book3, book4, book5, book6,book7};

            collection.InsertManyAsync(books);

            var client = new MongoClient();
            var db = client.GetDatabase("publisher");
            var collection = db.GetCollection<Book>("books");
            
            var filter=new BsonDocument();
            var docs = collection.Find(filter).ToList();
            foreach (var book in docs)
            {
                Console.WriteLine(book.Title + " By "+ book.Authors[0].Name);
            }

Gone With Wind By Margaret Mitchell
Jane Eyre By Charlotte Brontë
White Fang By Jack London
The Lost Symbol By Dan Brown
The Help By Kathryn Stockett
City of Glass By Cassandra Clare
The Lost Symbol By Dan Brown

var filter = Builders<Book>.Filter.Eq("Year", 2009);

            var docs = collection.Find(filter).ToList();
            foreach (var book in docs)
            {
                Console.WriteLine(book.Title + " By "+ book.Authors[0].Name);
            }

The Lost Symbol By Dan Brown
The Help By Kathryn Stockett
City of Glass By Cassandra Clare
The Lost Symbol By Dan Brown

   // var filter=new BsonDocument();
            var filterBuilder = Builders<Book>.Filter;
            var filter= filterBuilder.Eq("Year", 2009) | filterBuilder.Gte("Price",700000);

            var docs = collection.Find(filter).ToList();
            foreach (var book in docs)
            {
                Console.WriteLine(book.Title + " By "+ book.Authors[0].Name);
            }

Gone With Wind By Margaret Mitchell
White Fang By Jack London
The Lost Symbol By Dan Brown
The Help By Kathryn Stockett
City of Glass By Cassandra Clare
The Lost Symbol By Dan Brown

var docs = collection.AsQueryable().Where(x => x.Year == 2009 || x.Price <= 50000).ToList();

  var sort = Builders<Book>.Sort.Ascending("Title").Descending("Price");
            var docs = collection.Find(filter).Sort(sort).ToList();
            foreach (var book in docs)
            {
                Console.WriteLine(book.Title + " By "+ book.Authors[0].Name);
            }

City of Glass By Cassandra Clare
Gone With Wind By Margaret Mitchell
The Help By Kathryn Stockett
The Lost Symbol By Dan Brown
The Lost Symbol By Dan Brown
White Fang By Jack London

       public void AddNewCustomers(params Customer[] customers)
       {
           using (ISession session = _factory.OpenSession())
           {
               using (ITransaction transaction = session.BeginTransaction())
               {
                   foreach (var data in customers)
                       session.Save(data);

                   session.Flush();

                   transaction.Commit();
               }
           }
       }

using System.Collections.Generic;
using System.Linq;
using NHibernate;
using NHibernate.Linq;
using NHSample1.Domain;

namespace ConsoleTestApplication
{
   class CLinqTest : NHibernateContext
   {  }
}

using System.Collections.Generic;
using System.Linq;
using NHibernate;
using NHibernate.Linq;
using NHSample1.Domain;

namespace ConsoleTestApplication
{
   class CLinqTest : NHibernateContext
   {
       ISessionFactory _factory;

       public CLinqTest(ISessionFactory factory)
       {
           _factory = factory;
       }

       public List<Customer> GetAllCustomers()
       {
           using (ISession session = _factory.OpenSession())
           {
               var query = from x in session.Linq<Customer>() select x;
               return query.ToList();
           }
       }
   }
}

       static void Main(string[] args)
       {
           using (ISessionFactory session = Config.CreateSessionFactory(
                 MsSqlConfiguration
                    .MsSql2008
                    .ConnectionString("Data Source=(local);Initial Catalog=HelloNHibernate;Integrated Security = true")
                    .ShowSql()
               ))
           {

               var customer1 = new Customer()
               {
                   FirstName = "Vahid",
                   LastName = "Nasiri",
                   AddressLine1 = "Addr1",
                   AddressLine2 = "Addr2",
                   PostalCode = "1234",
                   City = "Tehran",
                   CountryCode = "IR"
               };

               var customer2 = new Customer()
               {
                   FirstName = "Ali",
                   LastName = "Hasani",
                   AddressLine1 = "Addr..1",
                   AddressLine2 = "Addr..2",
                   PostalCode = "4321",
                   City = "Shiraz",
                   CountryCode = "IR"
               };

               var customer3 = new Customer()
               {
                   FirstName = "Mohsen",
                   LastName = "Shams",
                   AddressLine1 = "Addr...1",
                   AddressLine2 = "Addr...2",
                   PostalCode = "5678",
                   City = "Ahwaz",
                   CountryCode = "IR"
               };

               CDbOperations db = new CDbOperations(session);
               db.AddNewCustomers(customer1, customer2, customer3);

               CLinqTest lt = new CLinqTest(session);
               foreach (Customer customer in lt.GetAllCustomers())
               {
                   Console.WriteLine("Customer: LastName = {0}", customer.LastName);
               }
           }

           Console.WriteLine("Press a key...");
           Console.ReadKey();

       }

       public List<Customer> GetCustomersByCity(string city)
       {
           using (ISession session = _factory.OpenSession())
           {
               var query = from x in session.Linq<Customer>()
                           where x.City == city
                           select x;
               return query.ToList();
           }
       }

               foreach (Customer customer in lt.GetCustomersByCity("Shiraz"))
               {
                   Console.WriteLine("Customer: LastName = {0}", customer.LastName);
               }

using System.Linq;
using NHibernate;
using NHibernate.Linq;
using NHSample1.Domain;

namespace ConsoleTestApplication
{
   class SampleContext : NHibernateContext
   {
       public SampleContext(ISession session)
           : base(session)
       { }

       public IOrderedQueryable<Customer> Customers
       {
           get { return Session.Linq<Customer>(); }
       }

       public IOrderedQueryable<Employee> Employees
       {
           get { return Session.Linq<Employee>(); }
       }

       public IOrderedQueryable<Order> Orders
       {
           get { return Session.Linq<Order>(); }
       }

       public IOrderedQueryable<OrderItem> OrderItems
       {
           get { return Session.Linq<OrderItem>(); }
       }

       public IOrderedQueryable<Product> Products
       {
           get { return Session.Linq<Product>(); }
       }
   }
}

using System.Collections.Generic;
using System.Linq;
using NHibernate;
using NHSample1.Domain;

namespace ConsoleTestApplication
{
   class CSampleContextTest
   {
       ISessionFactory _factory;

       public CSampleContextTest(ISessionFactory factory)
       {
           _factory = factory;
       }

       public List<Customer> GetCustomersByCity(string city)
       {
           using (ISession session = _factory.OpenSession())
           {
               using (SampleContext db = new SampleContext(session))
               {
                   var query = from x in db.Customers
                               where x.City == city
                               select x;
                   return query.ToList();
               }
           }
       }
   }
}