How do you transpose dimensions in a 2D collection using LINQ?

Just my 2 cents In pure linq:

 var transpond =           collection.First().Select((frow,i)=>collection.Select(row=>row.ElementAt(i)));

Or with some inpurity:

var r1 = collection.First().Select((frow, i) => collection.Select(row => row.ToArray()[i]));

Here's an approach that uses a generator instead of recursion. There's less array construction too, so it might be faster, but that's totally conjecture.

public static IEnumerable<IEnumerable<T>> Transpose<T>(
    this IEnumerable<IEnumerable<T>> @this) 
{
    var enumerators = @this.Select(t => t.GetEnumerator())
                           .Where(e => e.MoveNext());

    while (enumerators.Any()) {
        yield return enumerators.Select(e => e.Current);
        enumerators = enumerators.Where(e => e.MoveNext());
    }
}