Managed Code:-

• The code, which is developed in .NET framework is known as managed code.
• This code is directly executed by CLR with the help of managed code execution.
• Any language that is written in .NET Framework is managed code.

Unmanaged Code:-

• The code, which is developed outside .NET framework is known as unmanaged code.
• Applications that do not run under the control of the CLR are said to be unmanaged, and certain languages such as C++ can be used to write such applications, which, for example, access low - level functions of the operating system. Background compatibility with the code of VB, ASP and COM are examples of unmanaged code.
• Unmanaged code can be unmanaged source code and unmanaged compile code. Unmanaged code is executed with the help of wrapper classes.

Wrapper classes are of two types:

• CCW (COM Callable Wrapper).
• RCW (Runtime Callable Wrapper).