Concat
Returns a new collection that contains the elements of each the collection in order.
| Parameters | Returns |
|---|---|
| IEnumerable<IEnumerable<T>> sources | IEnumerable<T> |
| params IEnumerable<T>[ ] sources | IEnumerable<T> |
Usage
There's two different overloads of this function, but they works in a very similar way.
The first one requires that the parameter is an IEnumerable of IEnumerables and the second one uses the params keyword to provides a way to inform multiples standalone IEnumerables.
Concatenating an IEnumerable of IEnumerabls
//IEnumerable<IEnumerable<int>> sources =
// { { 1, 2, 3, 4, 5 }, { 6, 7, 8, 9, 10 } }
IEnumerable<int> result = sources.Concat()
//result = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 }
Concatenating three different collections
//IEnumerable<int> first = { 6, 7, 8, 9, 10 }
//IEnumerable<int> second = { 1, 2, 3, 4, 5 }
//IEnumerable<int> third = { 2, 4, 6, 8, 10 }
IEnumerable<int> result = first.Concat(second, third);
//result = { 6, 7, 8, 9, 10, 1, 2, 3, 4, 5, 2, 4, 6, 8, 10 }