DotNet andd C++ example

Libs/CMakeLists.txt

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+cmake_minimum_required (VERSION 3.10)
+
+project (TestExample CXX)
+
+set (SOURCES
+    src/Arithmetic.cpp
+    src/Entry.cpp)
+
+set (HEADERS
+    include/Arithmetic.h)
+
+add_library(TestExample SHARED ${SOURCES} ${HEADERS})
+include_directories(include)

Libs/include/Arithmetic.h

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+#ifndef ARITHMETIC_H_
+#define ARITHMETIC_H_
+
+class Arithmetic {
+public:
+    Arithmetic() = default;
+
+    int add(const int, const int);
+};
+
+#endif

Libs/src/Arithmetic.cpp

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+#include "Arithmetic.h"
+
+int Arithmetic::add(const int a, const int b) {
+    return a + b;
+}

Libs/src/Entry.cpp

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+#include "Arithmetic.h"
+
+
+extern "C" {
+int add(int, int);
+
+
+int add(int a, int b) {
+    Arithmetic matics;
+
+    return matics.add(a, b);
+}
+}