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    <p>If you think of the cache as a dictionary with a string key, it's obvious that the keys "TEST" and "test" are different because C# is case sensitive.</p> <p>But something doesn't seem right here. How do you know that NH is putting three entities in 2nd level cache? Assuming you're using a case-insensitive database, all three queries generated by the Get method will return the same row and the ID property on the entity will be set using the value returned by the query, not by the value supplied to the Get method. The entities will be cached using the entity's ID also. Do all three Gets return instances with the ID in the same case ("TestMode")?</p> <hr> <p>Update based on the edits to your question, if I understand you correctly:</p> <ul> <li>Get("TestMode") caches the object as expected and retrieves it from cache on subsequent requests for "TestMode"</li> <li>Get("testmode") or any other case goes back to the database</li> </ul> <p>That's the behavior I would expect. The value supplied for id is used to attempt to locate the entity in the cache. If a match is found then the entity is retrieved from cache; if not the database is queried. After the entity is retrieved, NHibnernate attempts to add it to the cache using its id as a key, but it already exists so the cached value is updated, replaced or ignored.</p> <p>The key point is that the id supplied to the query is used as a key to locate the entity in the cache, but the entity's id is used as the key when it is added to the cache.</p>
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    1. POIs there a way to make NHibernate treat string keys as case-insensitive?
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    1. USJamie Ide
    1. USJamie Ide
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    1. COI've been profiling using NHibernate Profiler, it shows when entities are loaded from the cache or the database. I will update the question with some information from the profiler. The collation for my database is Latin1_General_CI_AS
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      1. USJohn Pappin
    2. COThanks for your update, however Get("testmode") or any other case, goes to the database the first time but then appears to cache it's own version of entity from that point in time. The reason I know this is because I have subsequently updated the Setting value for the entity retrieved with "TestMode" which updates that value in the cache. But doing a subsequent Get("testmode") or any of the other casings still hits the cache according to the profiler but retrieves the old version of the entity. Get("TestMode") retrieves the new version of the entity.
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      1. USJohn Pappin
    3. COIs the entity mapped to read AND write to the cache? http://is.gd/7eXnSF. If not then the cached entity will be unchanged. In almost all cases, the 2nd level cache should be used for static, read-only data such as lookup table entries.
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      1. USJamie Ide
 

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