Utility Class for Vectors

Util.cs

public static class Util
{
    /// <summary>
    /// Extension that converts an array of Vector2 to an array of Vector3
    /// </summary>
    public static Vector3[] ToVector3(this Vector2[] vectors)
    {
        return System.Array.ConvertAll<Vector2, Vector3>(vectors, v => v);
    }

    /// <summary>
    /// Extension that, given a collection of vectors, returns a centroid 
    /// (i.e., an average of all vectors) 
    /// </summary>
    public static Vector2 Centroid(this ICollection<Vector2> vectors)
    {
        return vectors.Aggregate((agg, next) => agg + next) / vectors.Count();
    }

    /// <summary>
    /// Extension returning the absolute value of a vector
    /// </summary>
    public static Vector2 Abs(this Vector2 vector)
    {
        return new Vector2(Mathf.Abs(vector.x), Mathf.Abs(vector.y));
    }
}