Opc.Ua.WindowsCertificateStore.GetCspKeyContainerInfo C# (CSharp) Method

        private static CspKeyContainerInfo GetCspKeyContainerInfo(
	        IntPtr           hStore,
	        string           thumbprint, 
	        string           symbolicName, 
	        WindowsStoreType storeType)
        {
	        CRYPT_KEY_PROV_INFO pInfo;
            IntPtr pData = IntPtr.Zero;
            IntPtr pCertContext = IntPtr.Zero;

	        try
            {
                // get the certificates.
                pCertContext = FindCertificate(hStore, thumbprint);

                if (pCertContext == IntPtr.Zero)
                {
                    return null;
                }

		        // get size of the private key provider info struct.
		        int dwInfoSize = 0;

                int bResult = NativeMethods.CertGetCertificateContextProperty(
                    pCertContext,
			        CERT_KEY_PROV_INFO_PROP_ID,
			        pData,
			        ref dwInfoSize);

		        if (bResult == 0)
                {
                    // property must not exist.
                    return null;
		        }

		        // get private key provider info.
		        pData = Marshal.AllocHGlobal(dwInfoSize);

                bResult = NativeMethods.CertGetCertificateContextProperty(
                    pCertContext,
			        CERT_KEY_PROV_INFO_PROP_ID,
			        pData,
			        ref dwInfoSize);
                
		        if (bResult == 0)
		        {
			        int dwError = Marshal.GetLastWin32Error();
                    
		            throw ServiceResultException.Create(
                        StatusCodes.BadUnexpectedError,
			            "Could not get the provider info for certificate. Error={0:X8}", 
			            dwError);
		        }
                
                try
                {
                    pInfo = (CRYPT_KEY_PROV_INFO)Marshal.PtrToStructure(pData, typeof(CRYPT_KEY_PROV_INFO));
                }
                finally
                {
                    Marshal.DestroyStructure(pData, typeof(CRYPT_KEY_PROV_INFO));
                }
                
                string name1 = Marshal.PtrToStringUni(pInfo.pwszProvName);
                string name2 = Marshal.PtrToStringUni(pInfo.pwszContainerName);
                
                Marshal.FreeHGlobal(pData);
                pData = IntPtr.Zero;
                
		        // create the crypto service provide parameters.
		        CspParameters cps = new CspParameters(
			        pInfo.dwProvType, 
			        name1, 
			        name2);

		        cps.Flags = CspProviderFlags.UseExistingKey;

		        if (storeType != WindowsStoreType.CurrentUser)
		        {
			        cps.Flags |= CspProviderFlags.UseMachineKeyStore;
		        }
                
		        // get the container information.
		        CspKeyContainerInfo container = new CspKeyContainerInfo(cps);

		        // get the access rules on the file.
		        return container;
	        }
	        finally
            {
                if (pCertContext != IntPtr.Zero)
                {
                    NativeMethods.CertFreeCertificateContext(pCertContext);
                }

		        if (pData != IntPtr.Zero)
		        {
                    Marshal.FreeHGlobal(pData);
		        }
	        }
        }