When set to true, no files are actually downloaded; instead, events are fired that show what files would have been downloaded.
Namespace:  Microsoft.TeamFoundation.Build.Tasks
Assembly:  Microsoft.TeamFoundation.Build.ProcessComponents (in Microsoft.TeamFoundation.Build.ProcessComponents.dll)
Syntax
'Declaration
Public Property Preview As Boolean
public bool Preview { get; set; }
public:
property bool Preview {
    bool get ();
    void set (bool value);
}
member Preview : bool with get, set
function get Preview () : boolean 
function set Preview (value : boolean)
Property Value
Type: System.Boolean
Returns Boolean.
.NET Framework Security
- Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see Using Libraries from Partially Trusted Code.