StreamReader 获取文本问题

Question

用streamreader读文本的时候能否将 ";" 开头一行的文字整行过滤掉呢?
            StreamReader sr = new StreamReader("post.txt");
            string content = sr.ReadToEnd();
            sr.Close();
            textBox1.Text = content;如何改写呢

Answer 1

StreamReader sr = new StreamReader("post.txt");
            string content="";
string conline;
while(sr.Peek() >= 0)
{
    conline=sr.ReadLine();
    if(conline.indexOf(";")!=0)
       content+=conline;
}
            sr.Close();
            textBox1.Text = content;

Answer 2

StreamReader sr = new StreamReader("post.txt");
StringBuilder sb = new StringBuilder();
            string content = sr.ReadLine();
while(content != null)
{
  if(!content.StartWith(";"))
{
  sb.Append(content)
}
content = sr.ReadLine();}
            sr.Close();
            textBox1.Text = sb.ToString();

Answer 3

StreamReader sr = new StreamReader("post.txt");
            {
                string content = "";
                string conline;
                while (sr.Peek() >= 0)
                {
                    conline = sr.ReadLine();
                    if (conline.IndexOf(";") != 0)
                        content += "\r\n" + conline;
                }
                sr.Close();
                textBox1.Text = content.ToString ();
            }完结