Verifier.cs

using System.Diagnostics;
using System.IO;
using System.Text.RegularExpressions;
using Microsoft.Build.Utilities;
using NUnit.Framework;

public static class Verifier
{
    public static void Verify(string beforeAssemblyPath, string afterAssemblyPath)
    {
        var before = Validate(beforeAssemblyPath);
        var after = Validate(afterAssemblyPath);
        var message = $"Failed processing {Path.GetFileName(afterAssemblyPath)}\r\n{after}";
        Assert.AreEqual(TrimLineNumbers(before), TrimLineNumbers(after), message);
    }

    static string Validate(string assemblyPath2)
    {
        var exePath = GetPathToPeVerify();
        if (!File.Exists(exePath))
        {
            return string.Empty;
        }
        var process = Process.Start(new ProcessStartInfo(exePath, "\"" + assemblyPath2 + "\"")
        {
            RedirectStandardOutput = true,
            UseShellExecute = false,
            CreateNoWindow = true
        });

        process.WaitForExit(10000);
        return process.StandardOutput.ReadToEnd().Trim().Replace(assemblyPath2, "");
    }

    static string GetPathToPeVerify()
    {
        return ToolLocationHelper.GetPathToDotNetFrameworkFile("peverify.exe",TargetDotNetFrameworkVersion.VersionLatest);
    }

    static string TrimLineNumbers(string foo)
    {
        return Regex.Replace(foo, @"0x.*]", "");
    }
}