MemoryCache case insensitive key lookup

Question

I'm trying to find a way to make the .net 4.0 MemoryCache.Default instance use a case insensitive comparer.

Is that possible?

var bob = new object();

MemoryCache.Default["Bob"] = bob;

bob == MemoryCache.Default["bob"]; --> true

Answer 1

From looking at the code through ILSpy, it doesn't appear to be possible. Because behind the scenes it is ultimately using the GetHashCode() of your key string.

I think the easiest work-around for this, is to implement a custom cache, extending MemoryCache that overrides all methods that interact with the key, and calls ToUpperInvariant() when passing it as parameter to the base call.