Create a new instance mapping an extension to a mime
            
| C# | Visual Basic | Visual C++ | 
public FileTypeItem( string ext, string mime )
Public Sub New ( _ ext As String, _ mime As String _ )
public: FileTypeItem( String^ ext, String^ mime )
- ext (String)
 - The file extension to map from
 
- mime (String)
 - The mime-type associated to the extension