CatSdkを使ったRoslynのサンプル

UseCatSdk.cs

var source = @"
using System;
using CatSdk.Utils;
public class SymbolSdk
{
 public static string Utf8ToHex(string message)
    {
        return Converter.Utf8ToHex(message);
    }
}
";

var options = CSharpParseOptions.Default
    .WithLanguageVersion(LanguageVersion.CSharp8);

var syntaxTree = CSharpSyntaxTree.ParseText(source, options, "SymbolSdk.cs");

var references = new MetadataReference[]
{
    MetadataReference.CreateFromFile(typeof(object).Assembly.Location),
    MetadataReference.CreateFromFile(typeof(Converter).Assembly.Location),
    MetadataReference.CreateFromFile(Assembly.LoadFrom("CatSdk.dll").Location),
    MetadataReference.CreateFromFile("netstandard.dllの場所"),
    MetadataReference.CreateFromFile("System.Runtime.dllの場所"),
};

var compilationOptions = new CSharpCompilationOptions(OutputKind.DynamicallyLinkedLibrary);

var compilation = CSharpCompilation.Create(
    "SymbolSdk.dll",
    new[] { syntaxTree },
    references,
    compilationOptions);

using var stream = new MemoryStream();
var emitResult = compilation.Emit(stream);

if (emitResult.Success)
{
    stream.Seek(0, SeekOrigin.Begin);
    var assembly = AssemblyLoadContext.Default.LoadFromStream(stream);
    var randomType = assembly.GetType("SymbolSdk");
    var method = randomType.GetMethod("Utf8ToHex");
    var result = (string)(method.Invoke(null, new object[]{"HELLO"}) ?? throw new InvalidOperationException());
    Console.WriteLine($"result: {result}");
}
else
{
    IEnumerable<Diagnostic> failures = emitResult.Diagnostics.Where(diagnostic =>
        diagnostic.IsWarningAsError ||
        diagnostic.Severity == DiagnosticSeverity.Error);

    foreach (Diagnostic diagnostic in failures)
    {
        Console.Error.WriteLine("{0}: {1}", diagnostic.Id, diagnostic.GetMessage());
    }
}