non-null

• Use any non - null value for user id and password , and click the
  使用任意（非空）值作为用户id和密码，并单击
• Is non - null , the function treats it as an array of structures of length
  不为null ，则该函数将其视作长度为*
• Is non - null , it is assumed that the key pair is contained in the key blob
  非空，则假定密钥blob中包含了密钥对。
• Aggregation over a set of values that are not all guaranteed to be non - null
  对一组不保证全为非空的值进行聚合。
• In non - debug builds , both functions just test for a non - null argument
  在非调试版本中，两个函数都仅测试非null参数。
• Requires caller to pass non - null parameter " source " to calcsquareroot
  要求调用方将非空参数“ source ”传递给calcsquareroot
• Objects based on nullable types are only boxed if the object is non - null
  基于可空类型的对象只在该对象为非空时才会装箱。
• It must be non - null
  它必须是非空的。
• Not all the non - null entries in delegates are instances of the same delegate type
  中的所有非空项都是同一委托类型的实例。
• Returns non - null , there is no guarantee that the memory really is available
  返回一个非空值，也不能确保现在真的有内存可用。