This returns an IEnumerable<string> (something better if the file has many thousand of lines and you only need to parse them one at a time). If you need an array, call it as ReadLines("myfile").ToArray() using LINQ.
public static IEnumerable<string> ReadLines(string path)
{
using (var fs = new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.ReadWrite, 0x1000, FileOptions.SequentialScan))
using (var sr = new StreamReader(fs, Encoding.UTF8))
{
string line;
while ((line = sr.ReadLine()) != null)
{
yield return line;
}
}
}
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