What is CLR

The common language runtime is the execution engine for .NET Framework applications.

It provides a number of services, including the following:

• Code management loading and execution
• Application memory isolation
• Verification of type safety
• Conversion of IL to native code
• Access to metadata
• Managing memory for managed objects
• Enforcement of code access security
• Exception handling, including cross-language exceptions
• Interoperation between managed code, COM objects, and pre-existing DLLs like unmanaged code and data
• Automation of object layout
• Support for developer services like profiling, debugging