How can I access a C# library from native C using C /CLI and IJW?

Accessing a C# Library from Native C Using C /CLI and IJW

Introduction:
Integrating managed and unmanaged code can be a complex task. This article explores using C /CLI and IJW to bridge the gap between C# and native C .

преимущества IJW vs. Other Approaches:
IJW provides several advantages over other methods:

• Avoids the performance overhead of COM objects.
• Supports both static and instance methods.
• Offers a clean interoperability interface.

Creating a C /CLR Wrapper:
To enable native C code to access a C# library, consider creating a C /CLR wrapper that uses IJW. This approach isolates the unmanaged code from the C# implementation, providing flexibility and ease of maintenance.

Key Considerations:

• Question 1: Advantages of IJW are centered around its simpler learning curve, direct support for C# method calls, and ability to work with both static and instance methods.
• Question 2: A tutorial on creating a C /CLR wrapper using IJW is available at [MSDN](https://docs.microsoft.com/en-us/dotnet/framework/interop/calling-managed-code-from-unmanaged-code).
• Question 3: To use a C /CLR library in unmanaged C code, you need to enable /clr on the .cpp file, specify the path to the C# assembly in the "additional #using directories" property, and reference the C /CLR header file (.h) in the native C code.

Example Code:

// Native.h
void NativeWrapMethod();

// Native.cpp
#using <mscorlib.dll>
#using <MyNet.dll>

namespace MyNetNameSpace
{
    void NativeWrapMethod()
    {
        MyNetNameSpace::MyManagedClass::Method();
    }
}

Conclusion:
By utilizing C /CLI and IJW, you can seamlessly access C# libraries from native C code. This approach provides a robust and interoperable solution for working with mixed-language applications.

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