This is now product suggestion FDBK12292.

BitArray Class

<br>Manages a compact array of bit values, which are represented as Booleans, where true indicates that the bit is on (1) and false indicates the bit is off (0).

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<br>System.Object

<br>System.Collections.BitArray

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<br>Thread Safety

<br>Public static (Shared in Visual Basic) members of this type are safe for multithreaded operations. Instance members are not guaranteed to be thread-safe.

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<br>This implementation does not provide a synchronized (thread-safe) wrapper for a BitArray.

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<br>Enumerating through a collection is intrinsically not a thread-safe procedure. Even when a collection is synchronized, other threads could still modify the collection, which causes the enumerator to throw an exception. To guarantee thread safety during enumeration, you can either lock the collection during the entire enumeration or catch the exceptions resulting from changes made by other threads.

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<br>Remarks

<br>The size of a BitArray is controlled by the client; indexing past the end of the BitArray throws an ArgumentException.

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<br>Indexes in this collection are zero-based.

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<br>Requirements

<br>Namespace: System.Collections

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<br>Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family, .NET Compact Framework

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<br>Assembly: Mscorlib (in Mscorlib.dll)

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https://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=93888

This has been raised, but no action.

Would be good to yell a bit more about it.