On this page
Apply the License Key
You can perform offline authentication using the following method:
c#
string resPath = "***";
string license = "***";
LibraryManager.InitLibrary(resPath);
LibraryManager.Initialize(license);
ErrorCode result = LibraryManager.LicenseVerify(License);
if (result != ErrorCode.e_ErrSuccess)
{
Console.WriteLine("License verification error!");
}