datasvcutil /out:file [/in:file | /uri:serviceuri] [/dataservicecollection] [/language:devlang] [/nologo] [/version:ver] [/help]

using System;
using System.Data.Services.Client;
using System.Net;
using Terrasoft.Sdk.Examples.CreatioServiceReference;
using System.Linq; 

private static Uri serverUri = new Uri("http://<server_name>/<application_name>/0/ServiceModel/EntityDataService.svc/"); 

static void OnSendingRequestCookie(object sender, SendingRequestEventArgs e)
{
    // Calling the method of the LoginClass class, which authenticates the user method transmitted in parameters.
    LoginClass.TryLogin("CreatioUserName", "CreatioUserPassword");
    var req = e.Request as HttpWebRequest;
    // Adding pre-received authentication cookie to the data receipt request.
    req.CookieContainer = LoginClass.AuthCookie;
    e.Request = req;
}

public static void GetOdataCollectioByLinqWcfExample()
{
    // Creating the context of the Creatio application.
    var context = new Creatio(serverUri);
    // Determining the method which adds authentication cookie when creating a new request.
    context.SendingRequest += new EventHandler<SendingRequestEventArgs>(OnSendingRequestCookie);
    try
    {
        // Building a LINQ request to receive the contacts collection.
        var allContacts = from contacts in context.ContactCollection
                          select contacts;
        foreach (Contact contact in allContacts)
        {
            // Implementing actions with contacts.
        }
    }
    catch (Exception ex)
    {
        // Error processing.
    }
}

public static void GetOdataCollectionByImplicitRequestExample()
{
    // Creating a context object of the Creatio application.
    var context = new Creatio(serverUri);
    // Determining the method which adds authentication cookie when creating a new request.
    context.SendingRequest += new EventHandler<SendingRequestEventArgs>(OnSendingRequestCookie);
    try
    {
        // Determining an implicit request to the service to receive the contacts collection.
        DataServiceQuery<Contact> allContacts = context.ContactCollection;
        foreach (Contact contact in allContacts)
        {
            // Implementing actions with contacts.
        }
    }
    catch (Exception ex)
    {
        // Error processing.
    }
}

public static void GetOdataCollectionByExplicitRequestExample()
{
    // Determining a Uri request to the service which returns the contacts collection.
    Uri contactUri = new Uri(serverUri, "ContactCollection");
    // Creating a context object of the Creatio application.
    var context = new Creatio(serverUri);
    // Determining the method which adds authentication cookie when creating a new request.
    context.SendingRequest += new EventHandler<SendingRequestEventArgs>(OnSendingRequestCookie);
    try
    {
        // Implementing an explicit request to the service by calling the Execute<>() method.
        foreach (Contact contact in context.Execute<Contact>(contactUri))
        {
            // Implementing actions with contacts.
        }
    }
    catch (Exception ex)
    {
        // Error processing.
    }
}

public static void GetOdataObjectByWcfExample()
{
    // Creating the context of the Creatio application.
    var context = new Creatio(serverUri);
    // Determining the method which adds authentication cookie when creating a new request.
    context.SendingRequest += new EventHandler<SendingRequestEventArgs>(OnSendingRequestCookie);
    var contact = context.ContactCollection.Where(c => c.Name.Contains("User")).First();
    // Implementing actions over the contact.
}

public static void CreateCreatioEntityByOdataWcfExample()
{
    // Creating a new contact, initiating properties.
    var contact = new Contact()
    {
        Id = Guid.NewGuid(),
        Name = "New Test User"
    };
    // Creating and initiating properties of a new account, to which the created contact refers. 
    var account = new Account()
    {
        Id = Guid.NewGuid(),
        Name = "Some Company"
    };
    contact.Account = account;
    // Creating the context of the Creatio application.
    var context = new Creatio(serverUri);
    // Determining the method which adds authentication cookie when creating a new request.
    context.SendingRequest += new EventHandler<SendingRequestEventArgs> (OnSendingRequestCookie);
    // Adding the created contact to the contacts collection of the service data model. 
    context.AddToAccountCollection(account);
    // Adding the created account to the accounts collection of the service data model.
    context.AddToContactCollection(contact);
    // Setting the relationship between the created contact and account in the service data model.
    context.SetLink(contact, "Account", account);
    // Saving the modification of data in Creatio by one request.
    DataServiceResponse responces = context.SaveChanges(SaveChangesOptions.Batch);
    // Processing the server responses.
}

public static void UpdateCreatioEntityByOdatetWcfExample()
{
    // Creating the context of the Creatio application.
    var context = new Creatio(serverUri);
    // Determining the method which adds authentication cookie when creating a new request.
    context.SendingRequest += new EventHandler<SendingRequestEventArgs>(OnSendingRequestCookie);
    // The contact on which basis the data will be modified is selected from the contacts collection.
    var updateContact = context.ContactCollection.Where(c => c.Name.Contains("Test")).First();
    // Modifying the selected contact properties.
    updateContact.Notes = "New updated description for this contact.";
    updateContact.Phone = "123456789";
    // Saving the modifications in the service data model.
    context.UpdateObject(updateContact);
    // Saving the modification of data in Creatio by one request.
    var responces = context.SaveChanges(SaveChangesOptions.Batch);
}

public static void DeleteCreatioEntityByOdataWcfExample()
{
    // Creating the context of the Creatio application.
    var context = new Creatio(serverUri);

    context.SendingRequest += new EventHandler<SendingRequestEventArgs>(OnSendingRequestCookie);
    // The object which will be deleted is selected from the contacts collection.
    var deleteContact = context.ContactCollection.Where(c => c.Name.Contains("Test")).First();
    // Deleting the selected object from the service data model.
    context.DeleteObject(deleteContact);
    // Saving the modification of data in Creatio by one request.
    var responces = context.SaveChanges(SaveChangesOptions.Batch);
    // Processing the server responses.
}