/// <summary>
		/// 設定を保存します
		/// </summary>
		public async Task Save()
		{
			await Task.Run(() =>
			{
				// Serialize
				var json = new JsonObject();
				JsonPrimitive element;

				JsonPrimitive.TryCreate(Account.BaseUrl, out element);
				json.Add("BaseUrl", element);

				JsonPrimitive.TryCreate(Account.UserKey, out element);
				json.Add("UserKey", element);

				JsonPrimitive.TryCreate(PostTextFormat, out element);
				json.Add("PostTextFormat", element);

				JsonPrimitive.TryCreate((int)TargetPlayer, out element);
				json.Add("TargetPlayer", element);

				JsonPrimitive.TryCreate(IsAutoPost, out element);
				json.Add("IsAutoPost", element);

				JsonPrimitive.TryCreate(AutoPostInterval, out element);
				json.Add("AutoPostInterval", element);

				// Save
				using (var sw = new System.IO.StreamWriter("setting.json"))
				{
					json.Save(sw);
				}
			});
		}