/// <summary>
/// The register custom handler.
/// The custom handler must be registered before calling "Run".
/// Alternatively this can be done before window is created during ChromelyConfiguration instantiation.
/// Only one type of custom handler can be registered. The first one is valid, consequent registrations will be ignored.
/// </summary>
/// <param name="key">
/// The key.
/// </param>
/// <param name="implementation">
/// The implementation.
/// </param>
public void RegisterCustomHandler(CefHandlerKey key, Type implementation)
{
if (_windowCreated)
{
throw new Exception("\"RegisterCustomHandler\" method must be called before \"Run\" method.");
}
HostConfig?.RegisterCustomHandler(key, implementation);
}