CopyProperties between same object type

CopyProperties.cs

public static void CopyTo<T, TProperties>(this T source, T target, Expression<Func<T, TProperties>> expression)
{
    MemberExpression? memberExpression = expression.Body as MemberExpression;
    if (memberExpression is null)
        return;

    List<MemberExpression> listMemberExpression = new([memberExpression]);//child to parent
    while (true)
    {
        MemberExpression? child_memberExpression = memberExpression?.Expression as MemberExpression;
        if (child_memberExpression is null)
        {
            break;
        }
        else
        {
            memberExpression = child_memberExpression;
            listMemberExpression.Add(child_memberExpression);
        }
    }
    listMemberExpression.Reverse();

    object? _target = target;
    foreach (MemberExpression member in listMemberExpression)
    {
        PropertyInfo? propertyInfo = member?.Member as PropertyInfo;
        if (propertyInfo is not null)
        {
            if (listMemberExpression.Last().Equals(member))
            {
                if (propertyInfo.CanRead && propertyInfo.CanWrite)
                {
                    var compile = expression.Compile();
                    var value = compile(source);

                    propertyInfo.SetValue(_target, value);
                }
                break;
            }
            else if (propertyInfo.CanRead)
            {
                _target = propertyInfo.GetValue(_target);
            }
            else break;
        }
    }
}

Example.cs

Data a = new();
Data b = new();

a.CopyTo(b,x=> x.Prop1);
a.CopyTo(b,x=> x.Prop2.Child1);