C＃：如果数组中包含值3，则返回true，否则返回false

Question

I'm trying to translate

"A method that returns true if the value 3 is contained in the array and false otherwise."

into code, but so far the only thing I could come up with is

class Test
{
    static void Main(string[] args)
    {
        ValueThree();
    }
    static bool ValueThree()
    {
        int[] arr = { 1, 2, 3 };
        if (Array = 3)
    }
    return true;
}

Not really sure where do go from here, any feedback would be much appreciated.

Answer 1

An C#-Array implements the IEnumerable<TSource> interface. One of the defined methods on this interface is the Contains(TSource element) method which checks if the element is in the collection of elements.

So in your case it should be:

static bool ValueThree()
{
    int[] arr = { 1, 2, 3 };
    return arr.Contains(3);
}