AutoCAD .NET :: Replacing Text Of MText And DBText Entities With Some String Value

I was writing code for my custom .net extension dll and one of the procedure involved therein was to replace the Text of MTEXT and DBTEXT entities with some predetermined Text String. I am using C#, AutoCAD 2012, and Visual Studio 2010. Here is the part of code wherein I am trying to replace the Text String of the MTEXT or DBTEXT entities.

  foreach (SelectedObject selectedObject in selectionSet) { Entity currentEntity = transaction.GetObject(selectedObject.ObjectId, OpenMode.ForWrite, false) as Entity; if (currentEntity == null) { continue; } if (currentEntity.GetType() == typeof(MText)) { ((MText)currentEntity).Contents = textToCopy; } else { ((DBText)currentEntity).TextString = textToCopy; } } transaction.Commit();

 The issue is that the text of the MTEXT or DBTEXT is not getting replaced with the string I am trying to. I debugged the code and it correctly hits the setting of MText.Contents == "Some String" and also transaction.commit(). But the text of the MTEXT still remains to the old value. Is this the correct way of changing the text of MTEXT / DBTEXT  through the .Net API.