Method not found: ‘Boolean MS.Internal.AssemblyHelper. IsXLinqNonIdempotentProperty’


If you are using .NET 4, and run into this exception:

Method not found: ‘Boolean MS.Internal.AssemblyHelper.IsXLinqNonIdempotentProperty’

Then it turns out that there is actually a bug in .NET 4, which seems to occur when you apply a ScaleTransform to an element that has nested templates (which is almost always the case in most LOB applications).

Turns out that the good folks at Microsoft have addressed this issue in December 2010, by releasing patch number KB2464222 which you can grab here :)

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