求一个简单的正则

[hellNo]

<img src = "..." width = "100" alt = "xxx" />哈哈<img src = "..." width = "100" alt = "xxx" />你好啊

如何把哈哈，你好啊 用正则拿出来啊？
正则没接触过，求助，谢谢了

[骑着蜗牛去爬山]

string pattern=@"(?<=>)[^<>]*(?=<|$)";

[EnForGrass]

string str="源字符串";
foreach(Match m in Regex.Matches(str,@"(?is)(?<=<img[^>]*?>)[^<>]*?(?=<img[^>]*?>|$)"))
{
  Console.WriteLine(m.Value);
}

[q107770540]

(?i)(?<=<img\b[^>]*?>)[^<>]+

[人傻且呆但不萌]

(?<=<.*?>)(?<content>\w+)