.NET BUG in Add method of Cache class?

[Eric Gates]

In MS documentation for "Add" method of "Cache" class, it says
"Calls to this method will fail if an item with the same key parameter is
already stored in the Cache."

However, when I did the following from an aspx webpage, I did not get any
exception. Is this a .NET BUG?

string key = "111";
Cache.Add(key, "222", null, DateTime.Now.AddSeconds(60), TimeSpan.Zero,
CacheItemPriority.Normal, null);
Cache.Add(key, "222", null, DateTime.Now.AddSeconds(60), TimeSpan.Zero,
CacheItemPriority.Normal, null);


Thanks,

Eric

 

[Jon Skeet [C# MVP]]

In MS documentation for "Add" method of "Cache" class, it says
"Calls to this method will fail if an item with the same key parameter is
already stored in the Cache."

However, when I did the following from an aspx webpage, I did not get any
exception. Is this a .NET BUG?

string key = "111";
Cache.Add(key, "222", null, DateTime.Now.AddSeconds(60), TimeSpan.Zero,
CacheItemPriority.Normal, null);
Cache.Add(key, "222", null, DateTime.Now.AddSeconds(60), TimeSpan.Zero,
CacheItemPriority.Normal, null);

The call will fail, but it won't throw an exception - instead, it'll
return the previous value. (See the return part of the docs.) Basically
it won't actually do the add, but it won't throw an exception. At
least, that's how I read the docs - but I agree they could be clearer.

 

[Eric Gates]

I did another quick test. You are right. Here the "fail" means doing
nothing.

Thanks,