create Properties.Setting at runtime

Question

hi

i want to create dynamically new Property.Settings at runtime i tried this code but not worked t

also no changes in setting (i am using wpf).can anyone help pls?

 

 

var property = new System.Configuration.SettingsProperty("propertyName");
            property.PropertyType = typeof(bool);
            property.DefaultValue = true;
            Properties.Settings.Default.Properties.Add(property);
            Properties.Settings.Default.Save();