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we have a fairly sizeable application (3 million + lines of code) in C++ / win32 api compiled into a single exe. &nbsp;We also have several of our own custom and 3rd party libraries and dll's mixed in. &nbsp;There are many features of c# that we would like to take advantage of. &nbsp;Is this possible without rewriting our entire application (something that is not going to happen)? &nbsp;
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we have a fairly sizeable application (3 million + lines of code) in C++ / win32 api compiled into a single exe.  We also have several of our own custom and 3rd party libraries and dll's mixed in.  There are many features of c# that we would like to take advantage of.  Is this possible without rewriting our entire application (something that is not going to happen)?  

migrating from c++

C# is an object-oriented programming language created in conjunction with Microsoft’s .NET framework. Compilation is usually done into the Microsoft Intermediate Language (MSIL), which is then JIT-compiled to native code (and cached) during execution in the Common Language Runtime (CLR).