C# - Zeilen einer Datei zählen

/// <summary>
/// Counts the lines of a File.
/// </summary>
/// <param name="fileToCount">The file to count.</param>
/// <returns>lines of a File</returns>
private static int CountLines(string fileToCount)
{
    int counter = 0;
    using (StreamReader countReader = new StreamReader(fileToCount))
    {
        while (countReader.ReadLine() != null)
            counter++;
    }
    return counter;
}