CRM 2011 KeyNotFoundException exception

Question

I am new to CRM development. I have a Custom Entity \"customer\". This Entity has a Field called \"defaultcustomer\", which can be TRUE or FALSE. I am working on a Plug-In where

Answer 1

Have you double checked that the field really is called defaultcustomer?

If it's a custom entity then it's likely the field begins with a prefix, for instance new_defaultcustomer. Make sure you are using the name of the field, not the display name.