无法反序列化值类型的 IComparable 字段

Question

我调查了有关 IComparable 属性的二进制序列化的问题，当 IComparable 属性被分配一个 DateTime 时，该问题会导致以下错误：

二进制流“0”不包含有效的 BinaryHeader。

下面的代码会产生这个问题：

/// <summary>
/// This class is injected with an icomparable object, which is assigned to a property.
/// If serialized then deserializes using binary serialization, an exception is thrown
/// </summary>
[Serializable]
public class SomeClassNotWorking
{
    public SomeClassNotWorking(IComparable property)
    {
        Property = property;
    }

    public IComparable Property;

}

public class Program
{
    static void Main(string[] args)
    {
        // var comparable = new SomeClass<DateTime>(DateTime.Today);
        // here we pass in a datetime type that inherits IComparable (ISerializable also produces the error!!)
        var instance = new SomeClassNotWorking(DateTime.Today);

        // now we serialize
        var bytes = BinaryHelper.Serialize(instance);
        BinaryHelper.WriteToFile("serialisedResults", bytes);

        // then deserialize
        var readBytes = BinaryHelper.ReadFromFile("serialisedResults");
        var obj = BinaryHelper.Deserialize(readBytes);
    }
}

我已通过将 IComparable 属性替换为实现 IComparable 的类型 T 属性解决了该问题：

/// <summary>
/// This class contains a generic type property which implements IComparable
/// This serializes and deserializes correctly without error
/// </summary>
/// <typeparam name="T"></typeparam>
[Serializable]
public class SomeClass<T> where T : IComparable
{
    public SomeClass(T property)
    {
        Property = property;
    }

    public T Property;
}

这可以毫无问题地进行序列化和反序列化。但是，为什么 IComparable 属性的序列化（当该属性是 DateTime 时）首先会导致问题，尤其是在 DateTime 支持 IComparable 的情况下？ ISerializable 也会发生这种情况。

Answer 1

这是一个已知错误，尚未修复：http://connect.microsoft.com/VisualStudio/feedback/details/91177/de-serialization-of-an-instance-of-a-class-implementing-icomparable-does-not-work