Avoid hardcoding - Early binding types in CRM 2011/2013 Plugins 

Early bound classes will contains the objects of entities in which it can be used to do the CRUD operation etc. in which it will give all the attribute values as well. But however, if checking for entity.Attributes.Contains like the below example, usually most of the developers uses hardcoding the attribute schema names.

protected void ExecuteTestPlugin(LocalPluginContext localContext)

        {

            if (localContext == null)

            {

                throw new ArgumentNullException("localContext");

            }

            IPluginExecutionContext context = localContext.PluginExecutionContext;

            IOrganizationService service = localContext.OrganizationService;

            XrmServiceContext sContext = new XrmServiceContext (service);

            Opportunity opportunity = ((Entity)context.InputParameters["Target"]).ToEntity< XrmServiceContext >();

if (pluginContext.MessageName.ToLowerInvariant() == "update")

            {

                if (opportunity.Attributes.Contains("name")

                {

                    //To do Business logic

                }

            }

}

Instead of highlighted code, the hardcoded values can be avoided by using the reflection concept as below.

Create a class which should have the following methods.

public class CommonFramework

    {

public string ReflectionPropertyName<T>(Expression<Func<T>> expression)

        {

            MemberExpression member = (MemberExpression)expression.Body;

            return member.Member.Name.ToLower();

 }

     }

Consume the above class in the highlighted area to avoid hardcoding.

if (pluginContext.MessageName.ToLowerInvariant() == "update")

            {

                if (opportunity.Attributes.Contains(new CommonFramework().ReflectionPropertyName(() => opportunity.EstimatedCloseDate)))

                {

                    //To do business logic

                }

            }

}

Happy Coding :)