Retrieve the members of a specific Team

The code to retrieve the members of a specific Team is quite easy, it's a standard QueryExpression, but contains a linked entity with a condition inside, it's good as start point for similar queries.

// Id of the specific Team
Guid teamId = new Guid("DAC1F09E-02EF-E311-A2AB-D89D67630DBC");
// main query returing users
QueryExpression userQuery = new QueryExpression("systemuser");
// take all columns
userQuery.ColumnSet = new ColumnSet(true);
// this is the intersect condition
LinkEntity teamLink = new LinkEntity("systemuser", "teammembership", "systemuserid", "systemuserid", JoinOperator.Inner);
// this is the condition to use the specific Team
ConditionExpression teamCondition = new ConditionExpression("teamid", ConditionOperator.Equal, teamId);
// add the condition to the intersect
teamLink.LinkCriteria.AddCondition(teamCondition);
// add the intersect to the query
userQuery.LinkEntities.Add(teamLink); 
//get the results
EntityCollection retrievedUsers = service.RetrieveMultiple(userQuery);
// fetch the results
foreach (Entity user in retrievedUsers.Entities)
{
    // Id of the user
    var userId = user.Id;
    // FullName of the user 
    var userFullName = user.Contains("fullname") ? user["fullname"].ToString() : "";
}

Get the current user inside a Workflow

Inside CRM 2011 Process editor it's not possible to get the current user, in some cases a reference can be necessary (specially for automated workflows) in order to set the right user when the workflow is used to create or assign records.
A Custom Workflow Activity can be created for this purpose, taking advantage of the InitiatingUserId property.

using System;
using System.Activities;
using System.Collections.Generic;
using System.Runtime.Serialization;
using Microsoft.Xrm.Sdk;
using Microsoft.Xrm.Sdk.Workflow;

namespace WFUtils
{
    public class GetCurrentUser : CodeActivity
    {
        [Output("Current User")]
        [ReferenceTarget("systemuser")]
        public OutArgument<EntityReference> CurrentUser { get; set; }
        protected override void Execute(CodeActivityContext context)
        {
            IWorkflowContext workflowContext = context.GetExtension<IWorkflowContext>();
            CurrentUser.Set(context, new EntityReference("systemuser", workflowContext.InitiatingUserId));

        }
    }
}

After the Custom Activity is deployed using the Plugin Registration Tool, a new step is available

and the output parameter (Current User) can be used inside other steps

Get current user's full name with a synchronous call

An AJAX request can be made also synchronous, this can be useful when we want to make a simple and fast request inside CRM 2011.
In this example we will retrieve the full name of the current user and set the value to a custom field called "new_userfullname".

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