Added front and back end logic to export member data

src/Umbraco.Core/Models/PropertyType.cs

@@ -1,6 +1,5 @@
 using System;
 using System.Diagnostics;
-using System.Linq;
 using System.Reflection;
 using System.Runtime.Serialization;
 using System.Text.RegularExpressions;
@@ -436,4 +435,4 @@ namespace Umbraco.Core.Models
             return clone;
         }
     }
-}
+}