Message in Russian (Русский)
В атрибуте XmlnsDefinitionAttribute сборки "<var>Assembly Name </var>" отсутствует требуемое свойство. Задайте одновременно свойства ClrNamespace и XmlNamespace либо удалите атрибут XmlnsDefinitionAttribute.
Unlocalized message
An XmlnsDefinitionAttribute in assembly '<var>Assembly Name </var>' is missing a required property. Set both the ClrNamespace and XmlNamespace properties, or remove the XmlnsDefinitionAttribute.
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