Reading and Parsing Files in .NET - Performance For Hire

string line;

// Read the file and display it line by line.
System.IO.StreamReader file =
   new System.IO.StreamReader("c:\test.txt");

while((line = file.ReadLine()) != null)
{
   Console.WriteLine (line);
}

file.Close();

Dim theLine as String
Dim fsFile As New FileStream(inputFile, FileMode.Open)   'File Stream for the Input File
Dim fsImport As New FileStream(outputFile, FileMode.OpenOrCreate)  'File Stream for the Output File
Dim srFile As New StreamReader(fsFile)  'Stream Reader for Input File
Dim swfile As New StreamWriter(fsImport)   'Stream Writer for Output File

Do While srFile.Peek <> -1              'Do While it's not the last line of the file
    theLine = srFile.ReadLine           'Read the line
    Messagebox.Show(theLine, "Line-by-Line!")
Loop