The Datatype class must provide some object representation of the type that the validator can use for equality comparison and hash code calculation.

datatype类必须提供类型的某种对象表示，以便验证器可用来进行相等性比较和计算散列码。

youdao

Only properties you designate as key properties participate in tests of equality between anonymous type instances, or calculation of hash code values.

如果两个执行个体只宣告非索引键属性，但名称、型别、顺序和值都相等，则这两个执行个体还是不相等。

youdao

Only properties you designate as key properties participate in tests of equality between anonymous type instances, or calculation of hash code values.

如果两个执行个体只宣告非索引键属性，但名称、型别、顺序和值都相等，则这两个执行个体还是不相等。

youdao