public class Program

{

    public static void Main()

    {

        var l = new float[10000];

        var r1 = HasNaN1(l);

        var r2 = HasNaN2(l);

    }

​

    public static bool HasNaN1(float[] data)

    {

        for (var i = 0; i <= data.Length - 1; i++)

        {

            if (float.IsNaN(data[i]))

                return true;

        }

​

        return false;

    }

​

    public static bool HasNaN2(float[] data)

    {

        var s = 0.0f;

        for (var i = 0; i <= data.Length - 1; i++)

        {

            s += data[i];

        }

​

        return float.IsNaN(s);

    }

}