title: Validation Application Block Questions
body: <p>Has anyone used the validation application block from enterprise library?  Any success?</p>
  
  <p>Anyways, my question is with regards to validating a numeric unique identifier.  Lets say I have a Product class, with a ProductId property representing the unique identifier of the product.  It is numeric.  This identifier cannot be less than 1, it has to be greater than 1.  I do not what validation type to choose using the validation application block.  I was thinking of trying the range type, but it requires 2 values, a lower and an upper value.</p>
  
  <p>Another question to validating business object properties.  Is this the best way to test business objects?  I want to specify validation rules just once, then I want to use them across different layers, like ASP.NET.  I have never validated business objects this way, just on the client side.  Can someone please tell me what is the best route to go with and if I am in the right direction?</p>
  
  <p>Can someone advise?</p>
  
  <p>Thanks
  Brendan</p>