继承自 SharedVariable 类，并实现必要方法，结构如下：

    1. [System.Serializable]
    2. public class SharedOBJECT_TYPE : SharedVariable<OBJECT_TYPE>
    3. {
    4.    public static implicit operator SharedOBJECT_TYPE(OBJECT_TYPE value) { return new SharedOBJECT_TYPE { Value = value }; }
    5. }

    其中 OBJECT_TYPE 是数据类型。

    真实的例子：

    1.  [System.Serializable]
    2.     public class CustomClass
    3.     {
    4.         public int myInt;
    5.         public Object myObject;
    6.     }
    8.     [System.Serializable]
    9.     public class SharedCustomClass : SharedVariable<CustomClass>
    10.     {
    11.         public static implicit operator SharedCustomClass(CustomClass value) { return new SharedCustomClass { Value = value }; }
    12.     }