You can define wrapper boolean values, and use the CompareExchange
overload for T where T : class
, like this:
private static object TrueObj = true;
private static object FalseObj = false;
...
object val = TrueObj;
object result = Interlocked.CompareExchange(ref val, TrueObj, FalseObj);
if (val == FalseObj) { // Alternatively you could use if (!(bool)val) ...
...
}