string html = @"<div class=""c"" id=""C_3448822217297814"">
  <a href=""/u/256822820?vt=4&amp"">
  Baby_MR_GaG
  </a>
  。。。。。。。。。。。。。。。。。好多1
 </div>
<div></div>
 <div class=""c"" id=""C_3448822217297814"">
  <a href=""/u/256822820?vt=4&amp;"">
  Baby_MR_GaG
  </a>
  。。。。。。。。。。。。。。。。。好多1
 </div>
<div></div>
 <div class=""c"" id=""C_3448822217297814"">
  <a href=""/u/256822860?vt=4&amp;"">
  Baby_MR_GaG
  </a>
  。。。。。。。。。。。。。。。。。好多1
 </div>
<div></div>";
            string pattern = @"(?is)<a\s*href=""[^""]+""[^>]*>(.*?)</a>";
            MatchCollection mc = Regex.Matches(html, pattern);
            foreach (Match m in mc)
            {
                Console.WriteLine(m.Group[1].Value.Trim());//去掉收尾空格
            }
//或者
string pattern = @"(?is)(?<=<a\s*href=""[^""]+""[^>]*>).*?(?=</a>)";
            MatchCollection mc = Regex.Matches(html, pattern);
            foreach (Match m in mc)
            {
                Console.WriteLine(m.Value.Trim());//去掉收尾空格
            }
/*
  Baby_MR_GaG
  Baby_MR_GaG
  Baby_MR_GaG
*/

------解决方案--------------------

探讨


借用ls的html代码
C# code

 string html = @"<div class=""c"" id=""C_3448822217297814"">
  <a href=""/u/256822820?vt=4&amp;amp"">
  Baby_MR_GaG
  </a>
  。。。。。。。。。。。。。。。。。好多1
 </div>
<div></div>
 <div clas……