Message in Chinese (Simplified) (中文(简体))
类型“<var>Type Name</var>”不能用作泛型类型或方法“<var>Method name</var>”中的类型参数“<var>Y</var>”。可以为 null 的类型“<var>Type Name</var>”不满足“<var>X</var>”的约束。
Unlocalized message
The type '<var>Type Name</var>' cannot be used as type parameter '<var>Y</var>' in the generic type or method '<var>Method name</var>'. The nullable type '<var>Type Name</var>' does not satisfy the constraint of '<var>X</var>'.
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