Nested using statements in C#

Question

I am working on a project. I have to compare the contents of two files and see if they match each other precisely.

Before a lot of error-checking and validation, my first draft is:

  DirectoryInfo di = new DirectoryInfo(Environment.CurrentDirectory + "\\TestArea\\");   FileInfo[] files = di.GetFiles(filename + ".*");    FileInfo outputFile = files.Where(f => f.Extension == ".out").Single<FileInfo>();   FileInfo expectedFile = files.Where(f => f.Extension == ".exp").Single <FileInfo>();    using (StreamReader outFile = new StreamReader(outputFile.OpenRead()))   {     using (StreamReader expFile = new StreamReader(expectedFile.OpenRead()))     {       while (!(outFile.EndOfStream || expFile.EndOfStream))       {         if (outFile.ReadLine() != expFile.ReadLine())         {           return false;         }       }       return (outFile.EndOfStream && expFile.EndOfStream);     }   } 

It seems a little odd to have nested using statements.

Is there a better way to do this?

Answer 1

The preferred way to do this is to only put an opening brace { after the last using statement, like this:

using (StreamReader outFile = new StreamReader(outputFile.OpenRead())) using (StreamReader expFile = new StreamReader(expectedFile.OpenRead()))  {     ///... }