public string ToString() {
    var largest = 0.0;
    for (int x = 0; x < Width; x++) {
        for (int y = 0; y < Width; y++) {
            largest = Math.Max(largest, Grid[x, y]);
        }
    }

    var largestLength = Math.Round(largest).ToString().Length;
    var padding = "{0:" + new String('0', largestLength) + ".00}";
    var rowPrefix = "[ ";
    var rowSuffix = " ]";

    var formatted = "";
    for (int x = 0; x < Width; x++) {
        formatted += rowPrefix;
        for (int y = 0; y < Width; y++) {
            var format = y < Width - 1 ? padding + " " : padding;
            formatted += String.Format(format, Grid[x, y]);
        }
        formatted += String.Format("{0}{1}", rowSuffix, Environment.NewLine);
    }
    return formatted;
}