Something similar to sql IN statement within .NET framework?

Question

I have this function:

    public bool IsValidProduct(int productTypeId)
    {
        bool isValid = false;

        if (productTypeId == 10 ||
            productTypeId == 11 ||
            productTypeId == 12)
        {
            isValid = true;
        }

        return isValid;
    }

but I'm wondering if there's an easier way to write it, such as:

    public bool IsValidProduct(int productTypeId)
    {
        bool isValid = false;

        if (productTypeId.In(10,11,12))
        {
            isValid = true;
        }

        return isValid;
    }

I know I could write an extension method to handle this, I'm just curious if there's already something out there or if there's a better way to write it.

Answer 1

new [] {10, 11, 12}.Contains(productTypeId)