如何在从的TextReader 源？

我试过

 的foreach（源VAR行）
 

但得到的错误

foreach语句无法在类型System.IO.TextReader变量操作，因为System.IO.TextReader不包含GetEnumerator的

 串线;
而（（行= myTextReader.ReadLine（））！= NULL）
{
    DoSomethingWith（线）;
}
 

How do I loop over lines from a TextReader source?

I tried

foreach (var line in source)

But got the error

foreach statement cannot operate on variables of type 'System.IO.TextReader' because 'System.IO.TextReader' does not contain a public definition for 'GetEnumerator'

string line;
while ((line = myTextReader.ReadLine()) != null)
{
    DoSomethingWith(line);
}