CODEWITHSUNDEEP
c#.netcasting
Slevin
Slevin

Reputation: 181

Cast Class<object> to Class<T>

We have a generic class called Context<T> where T : class, and create another class Message to be used together with the previous one as Context<Message>. Generally speaking, we are wondering if there is a way to convert a Context<object> back to Context<Message>. We can do a check that the object is of type Message, but doing Context<Message> context = (Context<Message>) otherContext; where otherContext is Context<object>

Is this possible in some way?

Upvotes: 0

Views: 144

Answers (1)

weichch
weichch

Reputation: 10035

If you prefer cast, try this:

class YourClass<T> where T : class
{
    public static implicit operator YourClass<T>(YourClass<object> instance)
    {
        // Create YourClass<T> from YourClass<object>
        // e.g. return new YourClass<T>(...)
    }
}

var obj = new YourClass<object>();
YourClass<Message> msg = obj;

Otherwise, you could create a constructor:

class YourClass<T> where T : class
{
    public YourClass(YourClass<object> obj)
    {

    }
}

Or you can have both.

Upvotes: 2

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