Чтение файла (The process cannot access the file because it is being used by another process.)

Как мне читать файл, чтобы не вылезала эта ошибка: The process cannot access the file because it is being used by another process.

using (StreamReader sr = File.OpenText(filePath)) 
{
    string line = "";
    while ((line = await sr.ReadLineAsync()) != null) 
    {
        if (isFind)
        {
            if (line.IndexOf("steamId=", StringComparison.Ordinal) <= 0 && line.IndexOf("steamid=", StringComparison.Ordinal) <= 0) continue;
            string[] splitLine = line.Split('|');
            string lineWrite = splitLine[1];
            CustomSql.ExecuteQuery($"INSERT INTO `log_admin` (`action`) VALUES ('${lineWrite}')");
            _lastVppLine = line;
        }

        if (_lastVppLine == "")
            _lastVppLine = line;
        if (_lastVppLine == line)
            isFind = true;
    }
}