For example, if you know that your generic class is intended for use only with reference types, apply the class constraint.
例如，如果您知道您的泛型类仅用于引用类型，则应用类约束。
Picture of European standard below for your reference, if any query, PLS feel free to let us know.
以下附欧洲标准图片供参考。若有任何问题请随时与我们联系。
Picture of European standard below for your reference, if any query, PLS feel free to let us know.
以下附欧洲标准图片供参考。若有任何问题请随时与我们联系。
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