Using Update Method of CrmService WebService

// Set up the CRM Service.

CrmAuthenticationToken token = new

CrmAuthenticationToken();

// You can use enums.cs from the SDK\Helpers folder to get

the enumeration for AD Authentication.

token.AuthenticationType = 0;

token.OrganizationName =”AdventureWorksCycle”;

CrmService service = new CrmService();

service.Url

=”http://<servername&gt;:<port>/mscrmservices/2007/crmservice.

asmx”;

service.CrmAuthenticationTokenValue = token;

service.Credentials =

System.Net.CredentialCache.DefaultCredentials;

// Create the contact object.

contact contact = new contact();

// Set the contact object properties to be updated.

contact.address1_line1 =”34 Market St.”;

// The contactid is a key that references the ID of the

contact to be updated.

contact.contactid = new Key();

// The contactid.Value is the GUID of the record to be

changed.

contact.contactid.Value = new Guid(“4D507FFE-ED25-447B-

80DE-00AE3EB18B84″);

// Update the contact.

service.Update(contact);