Cache expensive methods calls with a declarative attribute. No custom code required.

[Cache.Cacheable] //this method now cached, will only be called once per guid
public SomeExpensiveObject GetExpensiveObject(Guid userId)
{
..
}

[Cache.Cacheable("UniqueKeyForThisMethod")] //cache using this key plus parameter(s)
public SomeObject GetObjectById(Int32 Id)
{
...
}

[Cache.TriggerInvalidation("UniqueKeyForThisMethod")] //delete from cache using this key and passed parameter(s)
public void RemoveObjectById(Int32 Id)
{
..
} 

More examples can also be found here: http://cascadeofinsights.com/post/1410736927/introducing-attribute-based-caching

Using postsharp to make method interceptions when a cached version exists

• http://paulstack.co.uk/blog/post/Attribute-Based-Caching-with-PostSharp.aspx
• http://cascadeofinsights.com/post/1410736927/introducing-attribute-based-caching
• http://www.infoq.com/news/2011/04/Attribute-Caching
• http://www.postsharp.net/blog/post/Attribute-Based-Caching-and-Unit-Testing-of-Aspects
• http://stackoverflow.com/questions/5328819/caching-attribute-for-method

• Original Codeplex Release

• faster key generation strategy - thanks payman
• basic unit tests - thanks payman
• btree disk cache
• removed unity dependency
• simple timetolive setting

• adding ignoreTTL
• adding support for colection to KeyBuilder
• adding deconstructor to btreecache - to clean up open filestream
• add compile-time reflection cache attribute
• GitHub version is the most recent version