A year ago we had published out attempt at creating WeakTable in .NET. This is not too often used API but at rare case it's just irreplaceable.
But yesterday a user @Paya has finally found our class to be useful, performed the code review, and identified some bugs. See discussion at StackOverflow.
Bug fixes are available at: https://github.com/nesterovsky-bros/WeakTable.
a@href@title, b, blockquote@cite, em, i, strike, strong, sub, super, u