Yield Return Many?

Question

I find myself foreach-ing over IEnumerables a lot just so that I can return each result. Is there a way to compress something like this

foreach (var subSelec         


        

Answer 1

With C# 7.0, local functions are allowed, which enables us to have a fairly neat approach

IEnumerable FlatEnumerable(){
    IEnumerable> NestedEnumerable(){
       yield return myEnumerable1;
       yield return myEnumerable2;
    }

    return NestedEnumerable().SelectMany(e => e);
}

https://docs.microsoft.com/en-us/dotnet/csharp/programming-guide/classes-and-structs/local-functions