public async Task SetRichMenuAsync(string userId, string menuName)
{
var menu = (await _client.GetRichMenuListAsync()).FirstOrDefault(m => m.Name == menuName);
if (menu == null)
{
return;
}
var currentMenuId = "";
try
{
currentMenuId = await _client.GetRichMenuIdOfUserAsync(userId);
}
catch (LineResponseException e)
{
if (e.StatusCode != System.Net.HttpStatusCode.NotFound)
{
throw;
}
}
if (menu.RichMenuId == currentMenuId)
{
return;
}
await _client.LinkRichMenuToUserAsync(userId, menu.RichMenuId);
}