Rollup Update 10 - Cannot insert duplicate key row in object

After installing Rollup Update 10, you may get the following errors when trying to import a solution in CRM 2011.

Cannot insert duplicate key row in object 'dbo.DependencyNodeBase' with unique index 'ndx_DependencyObjectId'. The statement has been terminated

Dependencies Calculation

This is an issue introduced by RU 10, and can be easily fixed by installing RU 11.

Plugin - How to send an Email

Plugin's are very useful business process components within CRM, they can be attached and configured to execute based on certain events and execute pre-defined business logic.

How to send an Email from a plugin is today's post, code example:

private void SendEmail(IOrganizationService service,
    Guid recieverUserId,
    Guid senderUserId,
    Guid regardingObjectId,
    string emailBody,
    string emailSubject)
{
    Entity email = new Entity();
    email.LogicalName = "email";

    //Regarding field, the record, which you want this email associated to
    EntityReference regardingObject = new EntityReference("opportunity", regardingObjectId);
    email.Attributes.Add("regardingobjectid",regardingObject);

    //Define the Sender and Receiver
    EntityReference from = new EntityReference("systemuser", senderUserId);
    EntityReference to = new EntityReference("systemuser", recieverUserId);

    //Activity Party - From
    Entity fromParty = new Entity("activityparty");
    fromParty.Attributes.Add("partyid",from);

    //Activity Party - To
    Entity toParty = new Entity("activityparty");
    toParty.Attributes.Add("partyid", to);

    EntityCollection collFromParty = new EntityCollection();
    collFromParty.EntityName = "systemuser";
    collFromParty.Entities.Add(fromParty);

    EntityCollection collToParty = new EntityCollection();
    collToParty.EntityName = "systemuser";
    collToParty.Entities.Add(toParty);

    email.Attributes.Add("from",collFromParty);
    email.Attributes.Add("to", collToParty);

    //Set Email Subject & Body
    email.Attributes.Add("subject",emailSubject);
    email.Attributes.Add("description", emailBody);

    //Create email activity
    Guid emailID = service.Create(email);

    //Sending email
    SendEmailRequest reqSendEmail = new SendEmailRequest();
    reqSendEmail.EmailId = emailID;
    reqSendEmail.TrackingToken = string.Empty;
    reqSendEmail.IssueSend = true;           

    SendEmailResponse res = (SendEmailResponse)service.Execute(reqSendEmail);
}

The method demonstrates how to send an email, passing in the appropriate parameters. This example is sending an email from and to internal System Users, however this can be easily adapted for other purposes.

Note: Your email mechanism need's to be configured correctly in order for this to work e.g. CRM Email Router.