[Mono-osx] problem casting NSNull to CAAction

Robert Blackadder robblackadder at yahoo.com
Sun Oct 2 20:04:59 EDT 2011

Hello,I need to implement the bit of obj-c code below for mono mac / mono touch.I can't find a way to cast NSNull which needs to be returned in this case.I got -- return (CAAction)NSNull.FromObject(null) -- to compile but crashes at runtime complaining that it can't cast to CAAction

Can someone help please?

-(id<CAAction>)actionForLayer:(CALayer*)layer forKey:(NSString*)key {
    if(layer ==yourLayer)
        if([key isEqualToString:@"contents"])
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