By default it will write to streams and files using Encoding.Default. This can be overridden: See http://msdn.microsoft.com/en-us/library/windows/desktop/dd317756%28v=vs.85%29.aspx and http://msdn.microsoft.com/en-us/library/system.text.encoding.aspx

Public Property Encoding As Encoding

Dim instance As OutputCsvLogic
Dim value As Encoding
 
instance.Encoding = value
 
value = instance.Encoding

public Encoding Encoding {get; set;}

public:
property Encoding^ Encoding {
   Encoding^ get();
   void set (    Encoding^ value);
}