Recently I wrote about how some of the Serialization problems you can face when dealing with long running workflows. In this post I’m going to cover how I deal with logic changes in persisted workflows and also how you can make logic changes to your workflows without having to deploy code. Hosting the Workflow When it comes to hosting your workflows there are really only two options to consider. Self-Hosting WCF Workflow Service To be honest I only looked at the WCF Workflow Service model briefly and decided it wasn’t the best fit for the requirements as it couldn’t provide the same benefits of self-hosting within a Workflow Application . Workflow Instance Store In order to persist Workflow instances you need to first create the Workflow Instance Store database. For this you will need to use the following scripts: C:\Windows\Microsoft.NET\Framework\v4.0.30319\SQL\en\SqlWorkflowInstanceStoreSchema.sql C:\Windows\Microsoft.NET\Framework\v4.0.30319\SQL\en\Sq...