Caching is a component that stores data, transparently, so future requests for that same data can be extracted quicker. Data stored in a cache may be values computed earlier or duplicates of original values that are stored somewhere else. Caches should be small, but are used in computing because caching is able to access patterns in computer applications that are local. Caching will also provide and make data available when the data source is temporarily unavailable. Caching is used in .net development to improve performance and scalability of applications.

There are different types of caching, but .net development begins with object cache. Object enables .net developers to store everything from simple names to complex objects such as entire pages or datasets. Previously the cache object was under the system web.caching cache namespace. Many .net developers copied this namespace into their projects and used it in other Microsoft applications. In the current .NET Framework 4, .net development has progressed to include a caching system that contains APIs (application programming interface which is a source code used as a interface for software components to communicate with each other).that is designed for both Web and non-Web applications.

.Net Framework 4 provides an improved security model as well as the following components:

• Compatibility with applications that were developed with earlier .net framework versions.

• New Features and Improvements have been developed by .net development to include access ETW (Event Tracing for Windows) events for diagnostic purposes to help improve application performance.

• Parallel Computing simplifies the work of .net development in regards to applications and libraries by providing a model for writing multithreaded code. Developers can now write efficient, fine-grained and scalable parallel code without having to work through the thread pool. This makes programming and development easier for .net development.

• Managed Extensibility Framework or MEF is a new library that provides .net development with extensible and compos able applications.

• Networking for .net development includes security improvements for Windows authentication in addition to performance counters, support for using large byte range headers, applications to set HTTP headers, SSL support, mail header support, and credentials for password based authentication schemes.

• Web improvements for .net development includes APIs that enable the developer to extend cashing, support for compression for session-state data, and application preload manager or auto start features.

• Client improvements include new controls which include calendar, data grid and date picker. .NET development will be able to use touch and manipulation to create applications for Windows 7.

In summary, caching in .NET Framework provides .net development with changes that are designed to provide faster retrieval of data in storage bins. When the data source is unavailable, caching in .NET Framework 4 will allow data that has been previously used to be retrieved. In addition, security improvements will give applications added protection. Caching tasks will include managing .net developed cache entries, generate events that happen in response to cache entry changes, and specify expiration and expulsion information. The newly developed MemoryCache in .NET Framework 4 will be used for all caching responsibilities.