Console.ReadKey and pressing SHIFT+END returns invalid escape sequence on WSL/Ubuntu

[xoofx]

Description

From the issue in kalk#18

When pressing SHIFT+END with the following program in WSL:

using System;

namespace TestConsole
{
    class Program
    {
        static void Main(string[] args)
        {
            while (true)
            {
                var key = Console.ReadKey(true);
                Console.WriteLine($"Key: {key.Key} Modifiers: {key.Modifiers} Char: {(key.KeyChar < ' ' || (int)key.KeyChar >= 126 ? "0x" + ((int)key.KeyChar).ToString("x2") : key.KeyChar.ToString())}");
            }
        }
    }
}

It generates the following sequence on Linux:

Key: Escape Modifiers: 0 Char: 0x1b
Key: D1 Modifiers: 0 Char: 1
Key: 0 Modifiers: 0 Char: ;
Key: D2 Modifiers: 0 Char: 2
Key: F Modifiers: Shift Char: F

instead of generating the following on Windows:

Key: End Modifiers: Shift Char: 0x00

I don't know if it is a problem in .NET or WSL.

Configuration

Tested on all WSL Ubuntu versions (16.04, 20.04)
Tested with .NET Core App 3.1 and .NET 5.0

Regression?

No, it was already broken with netcoreapp3.1

Other information

No workaround

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Issue Details

---

Description

From the issue in kalk#18

When pressing SHIFT+END with the following program in WSL:

using System;

namespace TestConsole
{
    class Program
    {
        static void Main(string[] args)
        {
            while (true)
            {
                var key = Console.ReadKey(true);
                Console.WriteLine($"Key: {key.Key} Modifiers: {key.Modifiers} Char: {(key.KeyChar < ' ' || (int)key.KeyChar >= 126 ? "0x" + ((int)key.KeyChar).ToString("x2") : key.KeyChar.ToString())}");
            }
        }
    }
}

It generates the following sequence on Linux:

Key: Escape Modifiers: 0 Char: 0x1b
Key: D1 Modifiers: 0 Char: 1
Key: 0 Modifiers: 0 Char: ;
Key: D2 Modifiers: 0 Char: 2
Key: F Modifiers: Shift Char: F

instead of generating the following on Windows:

Key: End Modifiers: Shift Char: 0x00

I don't know if it is a problem in .NET or WSL.

Configuration

Tested on all WSL Ubuntu versions (16.04, 20.04)
Tested with .NET Core App 3.1 and .NET 5.0

Regression?

No, it was already broken with netcoreapp3.1

Other information

No workaround

Author:	xoofx
Assignees:	-
Labels:	area-System.Console, untriaged
Milestone:	-

[eiriktsarpalis]

Related to #802 and #44621. I can reproduce the issue locally.

[jeffhandley]

@adamsitnik This might be worth re-testing to see if it gets fixed as part of #802.