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Accessing array by reflection
maket.GetType()
     .GetProperty(q.xmltags)
     .SetValue(maket,Array.CreateInstance(q.xmltag),0
      ), null);

var tag = maket.GetType().GetProperty(q.xmltags).GetValue(maket, null);

dynamic temp = tag;
tag = temp.ToList().Add(test).ToArray();

var list = Enumerable.ToList(temp);
list.Add(test);
tag = Enumerable.ToArray(list);

IList list = {reflection "get" code}
list.Add(test);

maket.GetType()
 .GetProperty(q.ObjectType.xmltag)
 .SetValue(maket, tag , null);

var arrayList = new ArrayList((Array)tag);
arrayList.Add(newValue);
tag = arrayList.ToArray((Type)q.xmltag);