Lucene.Net.Core.Util.CharsRef refactor: Added backing field for Chars, and enforced "cannot be set to null" rule. Added WritableArray attribute.
Lucene.Net.Core.Util.CharsRef refactor: Added backing field for Chars, and enforced "cannot be set to null" rule. Added WritableArray attribute.

NightOwl888/lucenenet,laimis/lucenenet,laimis/lucenenet,apache/lucenenet,jeme/lucenenet,apache/lucenenet,apache/lucenenet,apache/lucenenet,NightOwl888/lucenenet,sisve/lucenenet,jeme/lucenenet,jeme/lucenenet,NightOwl888/lucenenet,NightOwl888/lucenenet,sisve/lucenenet,jeme/lucenenet