Property initialization must be done between BeginInit and EndInit calls. Once the BitmapImage has been initialized, property changes are ignored.
The following example demonstrates how to initialize a BitmapImage with a set of properties by using the BeginInit and EndInit methods.
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Supported in: 4.6, 4.5, 4, 3.5, 3.0
.NET Framework Client Profile
Supported in: 4, 3.5 SP1