Pass multiple variables to Parallel.ForEach?

Question

C++ / C#

private void button_Click(object sender, RoutedEventArgs e)
        {
                z_prox = Convert.ToInt32(textBox.Text);
                Task.Factory.StartNew(() => {
                testx(accitem, Prox);
            });
        }
        public void testx(string[] accitem, string [] Prox)
        {
            ParallelOptions options = new ParallelOptions();
            options.MaxDegreeOfParallelism = z_prox;
            Parallel.ForEach(Prox, options, Prox1 => {indieroyale(Prox1);});
        }

Tell me how to pass multiple variables to Parallel.ForEach?
Tried the type

Parallel.ForEach(Prox,accitem, options, Prox1 => {indieroyale(Prox1,ck);});

But a mistake

Answer 1

/*А нельзя ли просто объединить эти параметры в одну сущность, например так:
class Prox
{
    public string[] Prox1 {get;set;}
    public int[] Prox2 {get;set;}
}*/

If the number of rows in the arrays is equal, try something like this:

var items = new List<KeyValuePair<string, string>>();

for (int i = 0; i < Prox.Length; i++)
{
  items.Add(new KeyValuePair<string, string>(Prox[i], accitem[i]));
}

// с использованием Parallel, если массивы очень огромные
// Parallel.For(0, prox.Length, i => items.Add(new KeyValuePair<string, string>(Prox[i], accitem[i])));

Parallel.ForEach(items, options, p => indieroyale(p.Key, p.Value));

You can replace KeyValuePair with your own class, with two string fields, this does not change the essence.
UPD: And anyway, why do you need Parallel.ForEach? Do everything through Parallel.For, without any joins:

Parallel.For(0, Prox.Length, options, i => indieroyale(Prox[i], accitem[i]));

Answer 2

https://msdn.microsoft.com/en-us/library/system.th... here are the answers!

Answer 3

And what prevents to make of two types 1, in which both will be?
As with events, EventArgs 1 pcs, Sender 1 pcs and that's enough.

Answer 4

Simplified a little

ParallelOptions options = new ParallelOptions();
            options.MaxDegreeOfParallelism = Convert.ToInt32(textBox.Text);
            Parallel.ForEach(<b>accitem, Prox,</b> options, (Prox1, ck) => {indieroyale(Prox1, ck); });

But still an error.
Currently, Type Arguments for the Parallel.ForEach(IEnumerable, Func, Func, Action) method cannot be determined by use. Try to explicitly define the type arguments.