如何从.txt文件C#导入字符串

StreamReader reader = File.OpenText("file.txt");

string content = reader.ReadToEnd();

reader.Close();

using System;
using System.IO;

class Program
{
    static void Main()
    {
        try
        {
            StreamReader reader = File.OpenText("file.txt");
            string content = reader.ReadToEnd();
            reader.Close();

            Console.WriteLine("文件内容：");
            Console.WriteLine(content);
        }
        catch (Exception ex)
        {
            Console.WriteLine("读取文件时出错：" + ex.Message);
        }
    }
}