To fix this error, do not declare friends inside managed types.
若要修复此错误，请不要在托管类型内声明友元。
Describes how COM interop selects runtime versions and resolves managed types.
描述COM互操作如何选择运行时版本和解析托管类型。
This means that managed code can consume other managed types and instances, while strictly enforcing type fidelity and type safety.
这意味着托管代码可在严格实施类型保真和类型安全的同时使用其他托管类型和实例。
NET features through managed types, which provide support for features of the common language runtime and are subject to the advantages and restrictions of the runtime.
NET功能，托管类型提供对公共语言运行时功能的支持，同时受运行时的优势和限制的影响。
Managed types do not allow friends.
托管类型不允许有友元。
Managed types do not allow friends.
托管类型不允许有友元。
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