Get running / initiating user in Dynamics 365

GetRunningUser.cs

using System;
using System.Activities;
using Microsoft.Xrm.Sdk;
using Microsoft.Xrm.Sdk.Workflow;


namespace GeneralTools
{
public class GetRunningUser : CodeActivity
    {
        protected override void Execute(CodeActivityContext executionContext)
        {
            base.Execute(executionContext);

            UserArgument.Set(executionContext, new EntityReference("systemuser", context.UserId)); 
            InitiatingUserArgument.Set(executionContext, new EntityReference("systemuser", context.InitiatingUserId)); 

        }

        [Output("Running User")]
        [ReferenceTarget("systemuser")]
        public OutArgument<EntityReference> UserArgument { get; set; }
        
        [Output("Initiating User")]
        [ReferenceTarget("systemuser")]
        public OutArgument<EntityReference> InitiatingUserArgument { get; set; }

    }
}