How do I solve: The type or namespace Windows does not exist in namespace Microsoft?

Question

How do I solve this missing dependency? Googling around for this problem, it seems rare. I see similar ones like The type or namespace name 'Windows' does not exist in the namespace 'System' but nowhere do I see someone explain this particular message.

Log files naturally recorded by windows at locations such as C:\Windows\System32\WDI\LogFiles\BootPerfDiagLogger.etl record useful forensic security info, such as every process that ran persistently at boot.

My goal is to parse these files into some intermediary structure like XML or JSON so I can import the data to Python.

I wanted to parse Windows ETL files in Python for forensic / security data science. I thought this would be easy since there's a Python library for it but upon running that library, it doesn't work and is probably no longer maintained.

Luckily I found a Microsoft dev blog on parsing ETL files with the same classes Windows exposes to allow Windows Performance Analyzer to do it.

The example code shown was like:

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using Microsoft.Windows.EventTracing;
using Microsoft.Windows.EventTracing.Disk;
using Microsoft.Windows.EventTracing.Processes;

class FileOperation
{
    public IProcess IssuingProcess;
    public string Operation;
    public string Path;
    public long Size;
    public decimal Duration;
}

class Program
{
    public static void Main(string[] args)
    {
        var etlFileName = args[0];

        var diskTrace = Path.GetFileNameWithoutExtension(etlFileName) + "-disk.csv";
        var fileTrace = Path.GetFileNameWithoutExtension(etlFileName) + "-file.csv";

        using (ITraceProcessor trace = TraceProcessor.Create(etlFileName))
        {
            var pendingDisk = trace.UseDiskIOData();
            var pendingFile = trace.UseFileIOData();

            trace.Process();

            ProcessDisk(pendingDisk.Result, diskTrace);
            ProcessFile(pendingFile.Result, fileTrace);
        }
    }

I won't include the ProcessDisk and ProcessFile classes here because those seem to be geared toward whatever debugging purpose the writer had. Rather, I'm interested in trace. Based on the methods I see called: UseDiskIOData, UseFileIOData, presumably there is a longer list of methods like that I could use to access all available data for each trace.

My immediate goal with this question is just to view what methods exist on the trace object.

So I did some research on how you look at all properties on an object in C#, and there are plenty of answers, that's probably not a problem:

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Reflection;
using Microsoft.Windows.EventTracing;
using Microsoft.Windows.EventTracing.Disk;
using Microsoft.Windows.EventTracing.Processes;

class Program
{
    public static void Main(string[] args)
    {
        var etlFileName = args[0];

        #var diskTrace = Path.GetFileNameWithoutExtension(etlFileName) + "-disk.csv";
        #var fileTrace = Path.GetFileNameWithoutExtension(etlFileName) + "-file.csv";

        using (ITraceProcessor trace = TraceProcessor.Create(etlFileName))
        {
            Type myType = trace.GetType();
            IList<PropertyInfo> props = new List<PropertyInfo>(myType.GetProperties());

            foreach (PropertyInfo prop in props)
            {
                object propValue = prop.GetValue(trace, null);

                // Do something with propValue
                Console.WriteLine(propValue);
            }
            #var pendingDisk = trace.UseDiskIOData();
            #var pendingFile = trace.UseFileIOData();

            #trace.Process();

            #ProcessDisk(pendingDisk.Result, diskTrace);
            #ProcessFile(pendingFile.Result, fileTrace);
        }
    }

But what I did have a problem with is this:

The type or namespace Windows does not exist in namespace Microsoft

As I said, I looked around for solutions to this and found nothing.