MS CRM 2011 C#中获取Web Resource

// Create an e-mail message.    
// Create the 'From:' activity party for the email 
ActivityParty fromParty = new ActivityParty 
{ 
    PartyId = new EntityReference(SystemUser.EntityLogicalName, new Guid("F6F5BB29-D519-E211-B109-B499BAFDBEDA")) 
};

// Create the 'To:' activity party for the email 
ActivityParty toParty = new ActivityParty 
{ 
    PartyId = new EntityReference(SystemUser.EntityLogicalName, new Guid("F6F5BB29-D519-E211-B109-B499BAFDBEDA")) 
};


Email email = new Email 
{ 
    To = new ActivityParty[] { toParty }, 
    From = new ActivityParty[] { fromParty }, 
    Subject = "SDK Sample e-mail", 
    Description = "SDK Sample for SendEmail Message.", 
    DirectionCode = true 
}; 
Guid _emailId = service.Create(email);

QueryExpression mySavedQuery = new QueryExpression 
{ 
    ColumnSet = new ColumnSet(true), 
    EntityName = WebResource.EntityLogicalName, 
    Criteria = new FilterExpression() 
    { 
        Conditions = 
        {                        
            new ConditionExpression 
            { 
                AttributeName = "name", 
                Operator = ConditionOperator.Equal, 
                Values = {"aw_testxml.xml"} 
            } 
        } 
    } 
};

EntityCollection ec = service.RetrieveMultiple(mySavedQuery); 
if (ec != null && ec.Entities != null && ec.Entities.Count > 0) 
{ 
    WebResource webresource = ec.Entities[0].ToEntity<WebResource>(); 
                         
    ActivityMimeAttachment _sampleAttachment = new ActivityMimeAttachment 
    { 
        ObjectId = new EntityReference(Email.EntityLogicalName, _emailId), 
        ObjectTypeCode = Email.EntityLogicalName, 
        Subject = "Sample Attachment", 
        Body = webresource.Content, 
        FileName = "ExampleAttachment.xml" 
    };

    service.Create(_sampleAttachment); 
}