Fixes sql server DateTimeOffset mapping. Makes Custom DB types much more flexible and usable by 3rd parties.

src/Umbraco.Persistence.SqlCe/SqlCeSyntaxProvider.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.Data;
 using System.Linq;
@@ -300,10 +300,14 @@ where table_name=@0 and column_name=@1", tableName, columnName).FirstOrDefault()
                                  GetQuotedTableName(index.TableName), columns);
         }
 
-        public override string GetSpecialDbType(SpecialDbTypes dbTypes)
+        public override string GetSpecialDbType(SpecialDbType dbTypes)
         {
-            if (dbTypes == SpecialDbTypes.NVARCHARMAX) // SqlCE does not have nvarchar(max) for now
+            // SqlCE does not have nvarchar(max) for now
+            if (dbTypes == SpecialDbType.NVARCHARMAX)
+            {
                 return "NTEXT";
+            }
+
             return base.GetSpecialDbType(dbTypes);
         }
         public override SqlDbType GetSqlDbType(DbType dbType)