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Why can't I pass List as a parameter to a method that accepts List<object>?

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北恋
北恋 2021-01-11 13:31

The following code gives me this error:

Cannot convert from \'System.Collections.Generic.List\' to \'System.Collections.Generic.List\'.

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  • 长情又很酷
    长情又很酷 (楼主)
    2021-01-11 13:59

    I agree with Winston Smith's answer.

    I just wanted to point out as an alternative (although this possibly isn't the best way to handle the situation) that while List does not derive from List, Customer[] does derive from Object[].

    Therefore, it is possible to do this:

        {
        List customers = new List();
        // ...
        FillSmartGrid(customers.ToArray());
        // ...
    }

    public void FillSmartGrid(object[] items)
    {
    }

    Of course, the downside is that you're creating an array object just so you can pass it to this function.

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