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For example, when looking at the GlowCode profiler website it says:
"GlowCode 6.2 and x64 profile native, managed, and mixed C++, C#, .NET code"
What do they mean?
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Managed Code is converted to IL, Intermiddiate Language also termed as CIL of MSIL. Unmanaged Code is converted to native language code. Programmer has no low level access using Managed Code. Programmer can write low level access code using unmanaged code.
To put it very simply, managed code is just that: code whose execution is managed by a runtime. In this case, the runtime in question is called the Common Language Runtime or CLR, regardless of the implementation (for example, Mono, . NET Framework, or . NET Core/.
Native code is computer programming (code) that is compiled to run with a particular processor (such as an Intel x86-class processor) and its set of instructions. If the same program is run on a computer with a different processor, software can be provided so that the computer emulates the original processor.
It gets the managed code and compiles it into machine code. After that, the code is executed. The runtime here i.e. CLR provides automatic memory management, type safety, etc. C/C++ code, called "unmanaged code” do not have that privilege.
Native code is the code whose memory is not "managed", as in, memory isn't freed for you (C++' delete and C's free, for instance), no reference counting, no garbage collection. Managed code, you guessed it, is the code whose memory is free and allocated for you, garbage collection and other goodies.
Mixed code is when you have managed code that calls onto an unmanaged layer. Normally, when you have a pure unmanaged C++ DLL and you call it from .NET using P/invoke.
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