"<var>X</var>" не содержит определения для "<var>Y</var>", наилучшая перегрузка метода расширения "<var>Z</var>" имеет такие же недопустимые аргументы

Message in Russian (Русский)

Unlocalized message

'<var>X</var>' does not contain a definition for '<var>Y</var>' and the best extension method overload '<var>Z</var>' has some invalid arguments

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