AccidentalFish.ApplicationSupport.Powershell.ConfigAppliers.DotNetConfigurationApplier.ApplyAppSetting C# (CSharp) Метод

        private void ApplyAppSetting(ApplicationConfiguration configuration, XElement appSettings, string key, string value)
        {
            string xpath = $"add[@key='{key}']";
            XElement appSetting = appSettings.XPathSelectElement(xpath);
            if (configuration.Secrets.Contains(value))
            {
                appSetting?.Remove();
            }
            else
            {                
                if (appSetting == null)
                {
                    appSetting = new XElement("add", new XAttribute("key", key), new XAttribute("value", value));
                    appSettings.Add(appSetting);
                }
                else
                {
                    appSetting.SetAttributeValue("value", value);
                }
            }
        }
    }