What is managed code, in terms of .Net Technologies

In .Net Framework code is sometimes referred to as managed code because the CLR manages its lifetime and execution.The .NET framework provides several core run-time services to the programs that run within it - for example exception handling and security.For these services to work, the code must provide a minimum level of information to the runtime. Such code is called managed code. All C# and Visual Basic.NET code is managed by default