How to read files line by line in C#

This article describes the method of reading files line by line in C#. Share it for your reference. The details are as follows:

Here, C# is used to read files line by line, which is very useful for reading large files.

StreamReader sr = new StreamReader("");
string line;
while((line= ()) != null) {
 ("xml template:"+line);
}
if (sr != null)();
//should be in a "finally" or "using" block

I hope this article will be helpful to everyone's C# programming.