regarding C# adding objects to list using foreach loop

Question

foreach (string f in fileName)
{
    if (list.Where(p => p.FileName.Trim().Equals(f.Trim(), StringComparison.OrdinalIgnoreCase)).Count() == 0)
    {
        Serve         


        

Answer 1

This is because your loop keeps adding the same object over and over, so your list ends up with multiple references to the same object.

Add projectfile = new ProjectFile() to the top of your loop to fix this problem.