参照してる dll のバージョン調査

AssemblyReferences.cs

#define A

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Reflection.Metadata;
using System.Reflection.PortableExecutable;

var folders = new[]
{
    "調べたい dll を置いてるフォルダー一覧"
};

var asms = LoadAll(folders);

#if A
foreach (var asm in asms) Write(asm);
#endif

#if B
var g = asms.SelectMany(a => a.Refs).Distinct().GroupBy(r => r.Name);

foreach (var r in g)
{
    Console.WriteLine(r.Key);

    foreach (var (_, v) in r)
    {
        Console.Write("    ");
        Console.WriteLine(v);
    }
}

#endif

#if C

var list = new HashSet<string>(new[]
{
    "表示するものを絞るためのリスト"
    "System.Memory",
    "System.Threading.Tasks.Extensions",
    "System.Runtime.CompilerServices.Unsafe",
    "System.Buffers",
});

foreach (var asm in asms)
{
    if (list.Contains(asm.Def.Name))
    {
        Console.WriteLine("def " + asm.Def);
    }

    foreach (var r in asm.Refs)
    {
        if (list.Contains(r.Name))
        {
            Console.WriteLine("ref " + r + " from " + asm.Def.Name);
        }
    }
}

#endif

IEnumerable<Asm> LoadAll(string[] folders)
{
    foreach (var folder in folders)
    {
        foreach (var dllPath in Directory.GetFiles(folder, "*.dll"))
        {
            yield return Load(dllPath);
        }
    }
}

Asm Load(string path)
{
    using var file = System.IO.File.OpenRead(path);
    using var pe = new PEReader(file);

    var mr = pe.GetMetadataReader();

    var def = mr.GetAssemblyDefinition();
    var refs = new AsmDef[mr.AssemblyReferences.Count];

    int i = 0;
    foreach (var arh in mr.AssemblyReferences)
    {
        var ar = mr.GetAssemblyReference(arh);
        var name = mr.GetString(ar.Name);
        refs[i++] = new(name, ar.Version);
    }

    return new Asm(new(mr.GetString(def.Name), def.Version), refs);
}

void Write(Asm asm)
{
    Console.WriteLine(asm.Def);
    foreach (var r in asm.Refs)
    {
        Console.Write("    ");
        Console.WriteLine(r);
    }
}

record AsmDef(string Name, Version Version)
{
    public override string ToString() => (Name, Version).ToString();
}

record Asm(AsmDef Def, AsmDef[] Refs);