Message in Polish (Polski)
Ponieważ podstawowy element ServiceContract „<var>Contract Name</var>” zawiera element CallbackContract „X”, pochodny element ServiceContract „Y” musi także określać element X albo pochodny typ jako element CallbackContract.
Unlocalized message
Because base ServiceContract '<var>Contract Name</var>' has a CallbackContract 'X', derived ServiceContract 'Y' must also specify either 'X' or a derived type as its CallbackContract.
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