Debugger should allow variable creation in the REPL window

[gregg-miskelly]

Environment data

C# Extension version: 1.21.9

Steps to reproduce

• Create the following project.
• Set a breakpoint at the specified line
• Evaluate var x = bytes.Length();

using System;
using System.Buffers;
using System.Text;

namespace DNC31Con
{
    class Program
    {
        static void Main(string[] args)
        {
            byte[] bytes = { (Byte)'h', (Byte)'e', (Byte)'l', (Byte)'l', (Byte)'o', (Byte)'!' };
            ReadOnlySequence<Byte> sequence = new ReadOnlySequence<byte>(bytes);

            Console.WriteLine("Hello World!"); // breakpoint here
        }
    }
}

Expected behavior

Implicit variable 'x' should be created.

Actual behavior

Evaluation fails

[cartermp]

@gregg-miskelly @WardenGnaw has this gone in, given the label re: fixed pending insertion?

[gregg-miskelly]

This went in sometime while I was on leave, so I am not sure what the right release was, but it should be fixed in 1.21.18.