Question

I’m in the process of learning LINQ and would like some help the following method. How can I rewrite the following method to use LINQ?

private bool IsInList(string file, List<FileInfo> excelList)
{
    if (excelList != null && excelList.Count > 0)
    {
        foreach (FileInfo f in excelList)
        {
            if (string.Compare(f.FullName, file, StringComparison.OrdinalIgnoreCase) == 0)
            {
                return true;
            }
        }
    }

    return false;
}

Answer 1

I’d change the second parameter to accept an IEnumerable<FileInfo> instead so you’re not limiting yourself to just lists.

private bool IsInList(string file, IEnumerable<FileInfo> excelList)
{
    return excelList != null && excelList.Any(f => f.FullName.Equals(file, StringComparison.OrdinalIgnoreCase));
}