Using C# foreach tuple

Question

How can I work with tuples in a foreach loop?

The following code doesn't work:

foreach Tuple(x, y) in sql.lineparams(lines)
{

}

sql.lineparams(lines) is array of tuples <int, string>

Answer 1

What does the tuple consist of? Types called x and y? In that case, this should be your syntax:

foreach (Tuple<x, y> tuple in sql.lineparams(lines))
{
  ...
}

If the tuple actually consist of other types, like int and string, it will be like this:

foreach (Tuple<int, string> tuple in sql.lineparams(lines))
{
  ...
}

Or, you can let the compiler handle it for you:

foreach (var tuple in sql.lineparams(lines))
{
  ...
}

Answer 2

With C# 7 you can also directly reference the content of the tuple:

foreach ((x xVar, y yVar) in sql.lineparams(lines))
{

}