Custom Workflow (Real Time Workflow) with Input and OutPut Parameters in D365

using Microsoft.Xrm.Sdk;

using Microsoft.Xrm.Sdk.Workflow;

using System;

using System.Activities;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace CustomWorkflowAgeCalByDOB

{

    //DOB Calculate by using custom workflow (Real Time Workflow) with Input and OutPut Parameters

    /// <summary>

    /// Register a Workflow on Contact Entity on Create or Update(DOB filed) Event

    /// Create fields DOB DateTime and Age,Days of WholeNumber type in Contact entity

    /// Select the Custom workflow and fill the DOB

    /// In Update step Setproperties Age and day field

    /// </summary>

    public class Class1 : CodeActivity

    {

        [Input("Date of Birth")]

        public InArgument<DateTime> DOB { get; set; }

        protected override void Execute(CodeActivityContext context)

        {

            ITracingService tracingService = (ITracingService)context.GetExtension<ITracingService>();

            IWorkflowContext workflowContext = (IWorkflowContext)context.GetExtension<IWorkflowContext>();

            IOrganizationServiceFactory serviceFactory = (IOrganizationServiceFactory)context.GetExtension<IOrganizationServiceFactory>();

            IOrganizationService service = serviceFactory.CreateOrganizationService(workflowContext.UserId);

            DateTime dtDOB = DOB.Get(context);

            int CalculateAges = Convert.ToInt32(DateTime.Now.Subtract(dtDOB).TotalDays)/365;

            int CalculateDays = Convert.ToInt32(DateTime.Now.Subtract(dtDOB).TotalDays);

            Day.Set(context, CalculateDays);

            Age.Set(context, CalculateAges);

        }

        [Output("Age")]

        public OutArgument<Int32> Age { get; set; }

        [Output("Day")]

        public OutArgument<Int32> Day { get; set; }

    }

}