【要点解説】C# Script（Roslyn for Scripting）で自作アプリにスクリプト実行機能を組み込む

Microsoft.CodeAnalysis.CSharp.Scripting

using Microsoft.CodeAnalysis.CSharp.Scripting;
using Microsoft.CodeAnalysis.Scripting;

// 実行したいC#スクリプトを変数に格納
var program  = "var i = 100;  return i * 5;";

//実行したいスクリプトを渡してCSharpScriptのインスタンスを生成
var script = CSharpScript.Create(program);

//C#スクリプトを実行し、結果を受け取る
var result = script.RunAsync().Result;

int a = 100;
int b = 200;
return a + b;

int val = (int)result.ReturnValue;

var script = CSharpScript.Create(script);
var result = script.RunAsync().Result;
string res = (result.ReturnValue == null) ? "" : result.ReturnValue.ToString();

//C#スクリプトの引数として渡すクラス
public class MyArgs
{
    public int MyValue { get; set; }
    public int MyMethod(int value)
    {
        return value * value * value;
    }
}

var args = new MyArgs();
args.MyValue = 100;

var script = CSharpScript.Create(uxScript.Text, globalsType: typeof(MyArgs));
var result = script.RunAsync(args).Result;
uxResult.Text = (result.ReturnValue == null) ? "" : result.ReturnValue.ToString();

MyValue = MyMethod(10);

using System.Reflection;

private void uxExec_Click(object sender, RoutedEventArgs e)
{
    //アセンブリの読み込み
    List<Assembly> assembly = new List<Assembly>()
    {
        Assembly.GetAssembly(typeof(System.Dynamic.DynamicObject)),  // System.Code
        Assembly.GetAssembly(typeof(Microsoft.CSharp.RuntimeBinder.CSharpArgumentInfo)),  // Microsoft.CSharp
        Assembly.GetAssembly(typeof(System.Dynamic.ExpandoObject)),
        Assembly.GetAssembly(typeof(System.Data.DataTable))
    };

    //C#スクリプトのインタプリタにインポートするアセンブリの指定
    List<string> import = new List<string>()
    {
        "System","System.Dynamic", "System.Linq", "System.Text","System.IO", "System.Collections.Generic", "System.Data"
    };

    //C#スクリプトのオプションパラメータにアセンブリとインポートのリストを登録
    var option = ScriptOptions.Default.AddReferences(assembly).AddImports(import);

    var script = CSharpScript.Create(uxScript.Text,options: option);
    var result = script.RunAsync().Result;
    uxResult.Text = (result.ReturnValue == null) ? "" : result.ReturnValue.ToString();
}

List<Assembly> assembly = new List<Assembly>()
{
    Assembly.LoadFrom("d:\MyCommon.dll")),
    Assembly.LoadFrom("d:\MyFileIO.dll"))
};

List<string> import = new List<string>()
{
    "MyCommon","MyFileIO"
};

// CancellationTokenSourceノインスタンスを生成し、Tokenプロパティを取得
var cancellationTokenSource = new CancellationTokenSource();
var cancellationToken = cancellationTokenSource.Token;

//Tokenプロパティの値をRunAsyncに渡す
var scriptState = await CSharpScript.RunAsync(script, options: scriptOptions, cancellationToken: cancellationToken);

// スクリプトの実行をキャンセルする
cancellationTokenSource.Cancel();

public string ExecScript(string source, Type argstype, object args)
{
    try
    {
        List<Assembly> assembly = new List<Assembly>()
        {
            Assembly.GetAssembly(typeof(System.Dynamic.DynamicObject)),  // System.Code
            Assembly.GetAssembly(typeof(Microsoft.CSharp.RuntimeBinder.CSharpArgumentInfo)),  // Microsoft.CSharp
            Assembly.GetAssembly(typeof(System.Dynamic.ExpandoObject)),
            Assembly.GetAssembly(typeof(System.Data.DataTable)),
        };

        List<string> import = new List<string>()
        {
            "System","System.Dynamic", "System.Linq", "System.Text","System.IO",
　　　　　　 "System.Collections.Generic", "System.Data"
        };

        var opt = ScriptOptions.Default.AddReferences(assembly).AddImports(import);

        var script = CSharpScript.Create(source, globalsType: argstype, options: opt);
        var result = script.RunAsync(globals: args).Result;
        var value = result.ReturnValue;

        return (value == null) ? "" : value.ToString();
    }
    catch
    {
    }
    return "";
}

var args = new MyArgs();
args.MyValue = 5;

ExecScript(uxScript.Text, typeof(MyArgs), args);


val res = args.MyValue;