tempuri.org is the default namespace applied to WCF Services and Workflow Services.  You can and should specify your service namespace. It is recommended that you explicitly specify a name and namespace for the service contract, and an action for each operation to avoid using " http://tempuri...

When I first saw NuGet I knew I had to find a way to take advantage of this great new way to deliver code to you.  It took a few months but finally the other day I decided to spend an afternoon working on a NuGet package for Microsoft.Activities.  Two and a half days later (isn’t that how it...

Humans Go to Control Panel / Programs / Programs and Features / View Installed Updates Use the Search Box to search the updates for KB2495593 KB2478063 Or if you prefer, search the list your self Microsoft .NET Framework 4 Platform Update 1 - Runtime Update Look for ...

Sometimes when using Windows Workflow Foundation (WF4) you need to create a custom WorkflowServiceHostFactory. There are a couple of main reasons why you would want to do this. To configure the WorklfowServiceHost in some way like adding an extension To do some other type of initialization work...

State machine is a well-known model for event-driven workflows and a highly requested feature from our WF4 users, especially those looking to move their WF3 State Machine workflows to WF4. We are very pleased to provide a new, fully-supported, WF4 State Machine including runtime and designer in the ...

Last year we at PDC10 we gave you a preview of the next release of Windows Workflow Foundation.  The video has just been posted to Channel 9. Windows Workflow Futures Speaker: Ron Jacobs Learn about the key investments we’re making in Windows Workflow Foundation (WF). See the WF improvements we...

How should you use WF4 and WCF with ASP.NET?  For this post I’ve created a really simple workflow and WCF service that delay for a specific amount of time and then return a value.  Then I created an ASP.NET page that I can use to invoke the workflow and WCF service to test their behavior The...

Even when AsyncCodeActivity.Cancel is called, the activity will still execute the EndExecute method, so it isn't immediately obvious why a second path of execution is necessary. Implementing this method is useful only when AsyncCodeActivityContext.MarkCanceled is implemented, which in turn is useful...

To access environment information from within an activity, you'll need to use the System.Activities.Hosting.SymbolResolver class. Here's the code to access the symbol resolver from within an activity: public sealed class SymbolUser : CodeActivity { protected override void Execute(CodeActivityContext...

The following error might occur when an activity executes: The argument of type '<type>' cannot be used. Make sure that it is declared on an activity. If the type above refers to an implementation child, then it's possible that it's being created in the Execute method of the activity. If...

This refers to the previous version of Workflow, but it came up in a recent discussion, so I thought I'd share the relevant points. When developing a Workflow solution that uses persistence and tracking, you may wonder if you should run the scripts for both schemas on the same database, or create...

Are you using WF/WCF in .NET 4? Would you like to help us improve WF/WCF in the next release? Would you mind spending an hour or two in a conference call talking about what you like, don't like and need help with? We are looking for customers who would be willing to share their stories with...

Lately on http://endpoint.tv we have been doing a series called WF4 Activities Best Practices with Leon Welicki. Many of you wrote in asking for the sample code so I’ve published on MSDN Code Gallery - WF4 Activity Best Practices Sample . Be sure to check out these episodes – great advice...

In this episode, Dave Cliffe, Program Manager for Workflow Services, describes the architecture of the Workflow Services infrastructure. For more information, see the Workflow Foundation developer center on MSDN .

In this episode, Windows Workflow Foundation team Program Manager Leon Welicki drops in to show us the team's guidelines for developing custom activities.

In this episode, Windows Workflow Foundation team Program Manager Leon Welicki drops in to show us the team's guidelines for developing custom activities. For more information, see the Workflow Foundation developer center on MSDN .

Red Prairie is a software company building solutions for Workforce, Warehouse, and Transportation Management. Of course, every company they serve wants the solution to meet their unique business processes. In this episode, Dan Piessens, Software Architect for Red Prairie, shows us how Windows Workflow...

I’ve been creating a lot of Native Activities lately and to do it I would add a new item to my project using the Code Activity template. I kept wishing for a Native Activity template so now I’ve created one. Read more at Ron Jacobs Blog