LINQ 如何有效地將資料從寬格式轉換為高格式以進行網格顯示？

var grps = from d in data
           group d by d.Foo
           into grp
           select new
           {
               Foo = grp.Key,
               Bars = grp.Select(d2 => d2.Bar).ToArray()
           };

int rows = grps.Max(grp => grp.Bars.Length);

foreach (var grp in grps) {
    Console.Write(grp.Foo + "\t");
}

for (int i = 0; i < rows; i++) {
    foreach (var grp in grps) {
        Console.Write((i < grp.Bars.Length ? grp.Bars[i] : null) + "\t");
    }
    Console.WriteLine();
}