using System;
using Microsoft.Xrm.Sdk;

namespace Microsoft.Crm.Sdk.Samples
{    
    public class PreEventPlugin : IPlugin
    {
        public void Execute(IServiceProvider serviceProvider)
        {
            // Obtain the execution context from the service provider.
            IPluginExecutionContext context = (IPluginExecutionContext)serviceProvider.GetService(typeof(IPluginExecutionContext));

            //In this sample, the data to be passed to the post plug-in is
            // represented by a GUID.
            
            Entity contact = (Entity)context.InputParameters["Target"];

            Guid contactID  = new Guid(contact.Id.ToString());
            
            // Pass the data to the post event plug-in in an execution context shared
            // variable named PrimaryContact.

            context.SharedVariables.Add("PrimaryContact", (Object)contactID.ToString());           
        }
    }

    public class PostEventPlugin : IPlugin
    {
        public void Execute(IServiceProvider serviceProvider)
        {
            // Obtain the execution context from the service provider.
            IPluginExecutionContext context = (IPluginExecutionContext)serviceProvider.GetService(typeof(IPluginExecutionContext));

            // Obtain the contact from the execution context shared variables.
            if (context.SharedVariables.Contains("PrimaryContact"))
            {
                Guid contactID =  new Guid((string)context.SharedVariables["PrimaryContact"]);

                throw new InvalidPluginExecutionException("The value passed from the pre-Event plugin is :" + contactID.ToString());

                // Do something with the contact.
            }
        }
    }
}
//</snippetSharedVariablesPlugin>