Change a value atomically, then set it back after some operation

meh.cs

public class Meh
{
        public static void Change<TObj, TProp>(this TObj obj, Expression<Func<TObj, TProp>> propertyExpr, TProp newValue, Action operation)
        {
            var name = ((MemberExpression)propertyExpr.Body).Member.Name;
            var prop = typeof(TObj).GetProperty(name);
            var oldValue = prop.GetValue(obj, new object[0]);

            try
            {
                prop.SetValue(obj, newValue, new object[0]);
                operation();
            }
            finally
            {
                prop.SetValue(obj, oldValue, new object[0]);
            }
        }
}