Источник:
https://blogs.msdn.microsoft.com/mfp...ap-extensions/
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Requesting add a field or method extension capability to existing table maps Problem statement We have received requests to provide platform support for adding a field or method to table maps through extensions. Adding a field or a method to an existing table map, however, presents some challenges which can lead to unforeseen runtime errors....
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Источник:
https://blogs.msdn.microsoft.com/mfp...ap-extensions/