ns0 is an undeclared prefix while Deserialising XML

Question

I am trying to De-serialize XML below to C# classes:

<StaffingOrder xmlns="NameSpaceName">
  <ReportingRequirements>
    <ns0:ManagerName>__MANAGER_NAME</ns0:ManagerName>
    <ns0:SupervisorName>__SUPERVISOR_NAME</ns0:SupervisorName>
  </ReportingRequirements>
  <Comments>Comment</Comments>      
</StaffingOrder>

But while deserializing I am getting following Error:

Error: There was an error processing 'Test.xml'.
  - 'ns0' is an undeclared prefix

How can i deserialize ns0 tags.

Answer 1

The XML document is not namespace-well-formed because the prefix ns0 is not bound to any namespace. This is why it cannot be parsed.

It can be bound to a namespace of your choice with an xmlns:ns0 attribute in any tag around its use, like so:

<StaffingOrder
    xmlns="NameSpaceName"
    xmlns:ns0="http://www.example.com/some/namespace">
  <ReportingRequirements>
    <ns0:ManagerName>__MANAGER_NAME</ns0:ManagerName>
    <ns0:SupervisorName>__SUPERVISOR_NAME</ns0:SupervisorName>
  </ReportingRequirements>
  <Comments>Comment</Comments>      
</StaffingOrder>