How do I create a DataObject?

A DataObject can be created in three different overloads of the DataObject constructor.

[C#]

string mystring = 'Drag and Drop String Object';
DataObject dataobject = new DataObject(mystring);

[C#]

string mystring = 'Drag and Drop String Object';
DataObject dataobject = new DataObject(DataFormats.UnicodeText,mystring);

[C#]

string mystring = 'Drag and Drop String Object';
DataObject dataobject = new DataObject(DataFormats.UnicodeText,mystring,false);