New Post: add several vectors

Alternatively, if the vectors are very large you could try whether the following is faster:

var result = new double[length];
foreach(var array in arrays)
{
    Control.LinearAlgebraProvider.AddArrays(array, result, result);
}

Of course, if the vectors were actual Math.NET Numerics vectors you could do:

var vectors = new List<Vector<double>>();
vectors.Aggregate((a, b) => a + b);

Thanks,
Christoph