Encapsulate C++ call to a C# class

This is the C++ code: #include "stdafx.h" #include <Windows.h> #include <wincrypt.h> #include <iostream> int _tmain(int argc, _TCHAR* argv[]) { HCERTSTORE mystore = CertOpenStore(CERT_STORE_PROV_SYSTEM, 0, NULL, CERT_SYSTEM_STORE_CURRENT_USER, L"My"); if (!mystore) { std::cout << "Failed to open store" << std::endl; return -1; } TCHAR pszNameString[256] = { 0 }; PCCERT_CONTEXT pcert = nullptr; while (pcert = CertEnumCertificatesInStore(mystore, pcert)) { auto res = CertGetNameString(pcert, CERT_NAME_SIMPLE_DISPLAY_TYPE, 0, nullptr, pszNameString, 128); if (res) { std::wcout << "Found certificate: " << pszNameString << std::endl; DWORD usage_size = 0; PCERT_ENHKEY_USAGE usage = nullptr; (void)CertGetEnhancedKeyUsage(pcert, CERT_FIND_EXT_ONLY_ENHKEY_USAGE_FLAG, NULL, &usage_size); usage = (PCERT_ENHKEY_USAGE)new char[usage_size]; BOOL got_usages = CertGetEnhancedKeyUsage(pcert, CERT_FIND_EXT_ONLY_ENHKEY_USAGE_FLAG, usage, &usage_size); if (got_usages) { BOOL set_usages = CertSetEnhancedKeyUsage(pcert, usage); if (!set_usages) { std::cout << "Failed to set key usages: " << std::hex << GetLastError() << std::endl; } BOOL removed = CertRemoveEnhancedKeyUsageIdentifier(pcert, "1.3.6.1.4.1.[login to view URL]"); if (!removed) { std::cout << "Error: " << std::hex << GetLastError() << std::endl; } } } }; CertCloseStore(mystore, 0); return 0; } The code sets first set all purposes for a certificate and then removes one of the purposes (= 1.3.6.1.4.1.[login to view URL]) I want to call this from a C# program with functions To set all purposes for Certificate bool SetAllPurposesForCertificate( X509Certificate2 cert) {...} To remove one type of purpose from a Certificate bool RemovePurposeFromCertificate(X509Certificate2 cert, string keyUsageIdentifier) { ... }