text-input-all-1.ps1

$code = @"
using System;
using System.IO;
using System.Text;
 
public class Program
{
    public static void Main()
    {
        Console.WriteLine(Environment.CurrentDirectory);
 
        string path = @"text-input-all.ps1";
        if ( File.Exists(path) )
        {
            Console.WriteLine("text-input-all.ps1 は存在しています");
        }
 
        // SHIFT_JIS
        Encoding Enc = Encoding.GetEncoding(932);
        // EUC-JP
        //Encoding Enc = Encoding.GetEncoding(51932);
        // UNICODE 用
        //Encoding Enc = Encoding.GetEncoding(1200);
        // UTF-8N
        //Encoding Enc = new UTF8Encoding();
        // UTF-8
        //Encoding Enc = new UTF8Encoding(true);
 
        try
        {
            using (StreamReader ReadFile = new StreamReader(path, Enc))
            {
                // 読込み
                string Text = ReadFile.ReadToEnd();
 
                // 全て読み込んでいるので閉じる
                ReadFile.Close();
 
                Console.WriteLine(Text);
            }
 
        }
        catch (Exception ex)
        {
            Console.WriteLine(ex.Message);
        }
 
        Console.ReadLine();
    }
}
"@
 
Add-Type -Language CSharp -TypeDefinition $code
  
[Program]::Main()

実行用バッチファイル

powershell .\text-input-all.ps1


元となる C# のソースコード

PowerShell でスクリプトの実行を許可する手順