Forms folder missing error

http://aarohblah.blogspot.com/2009/12/issues-and-solutions-in-sharepoint.html provides the simple fix for this error "Could not find a part of the path" that occurs when deploying a workflow feature.

Add <Property Key="RegisterForms" Value="*.xsn" /> to the Feature.xml

VisualStateManager

...note that a well-designed control should generally handle its visual and behavioral states through VisualStateManager. http://msdn.microsoft.com/en-us/library/system.windows.frameworkelement.onapplytemplate(v=vs.95).aspx

Spline Keyframes

Tool here to calculate the first and second control points of Bezier curve used in a SplineDoubleKeyFrame

Sentinal Value

Returns the local value, or returns the sentinel value UnsetValue if no local value is set.

http://msdn.microsoft.com/en-us/library/system.windows.dependencyobject.readlocalvalue(v=vs.95).aspx

MVC vs MVVM

Model-View-Controller works very well if you want to have a single model and multiple views of the data, which is something you often want with a list. However, there are also many scenarios where you may want to have multiple models of the same or related data. In that sort of scenario, you may want to consider the Model-View-ViewModel that has become so popular.

http://loosexaml.wordpress.com/model-view-controller-for-a-list/