System.Configuration.LocalFileSettingsProvider.Upgrade C# (CSharp) Метод

        private void Upgrade(SettingsContext context, SettingsPropertyCollection properties, bool isRoaming) {
            string prevConfig = GetPreviousConfigFileName(isRoaming); 
            
            if (!String.IsNullOrEmpty(prevConfig)) {
                //Filter the settings properties to exclude those that have a NoSettingsVersionUpgradeAttribute on them.
                SettingsPropertyCollection upgradeProperties = new SettingsPropertyCollection();
                foreach (SettingsProperty sp in properties) {
                    if (!(sp.Attributes[typeof(NoSettingsVersionUpgradeAttribute)] is NoSettingsVersionUpgradeAttribute)) {
                        upgradeProperties.Add(sp);
                    }
                }
                
                SettingsPropertyValueCollection values = GetSettingValuesFromFile(prevConfig, GetSectionName(context), true, upgradeProperties);
                SetPropertyValues(context, values);
            }
        }