Question: I am trying to create a method that will remove the first item from a list. Here's what a have so far...

```
public void removefromlist(int n)
{
    for(n != 0)
        n = n -1
        If(n -1 != 0)
            List.remove(n)
} 

```

Answer: 
According to this, <https://github.com/dotnet/corefx/pull/12426>, if I'm reading this right, it's missing until .NET Standard 1.7.

**Edit:** No, no, no, I got this all wrong. The problem was that I didn't have ".NET Core cross-platform development" selected when I installed Visual Studio 2017. That gave me the class library project template that targets .NET Frameworks. That seems like a bug to me because the "ASP.NET and web development" item says it includes ".NET Framework 4.6.1 development tools", but I guess it doesn't include all of them or something. I'm quite possibly very confused about this whole thing.
You need to either include the namespace at the top of the program trying to use the DataTable, or you need to fully qualify the name of the class, everytime you reference it. e.g.

```
using System.Data;

System.Data.DataTable myTable = new System.Data.DataTable();

```