Upload and Compare two CSV (Text) files in ASP.Net using C# and VB.Net

but i wanted to upload and compare

 what does this code do? does it retrive csv file from folder?

protected void Page_Load(object sender, EventArgs e)
{
    bool IsMatchedFirstColumn = GetCSVDiff(Server.MapPath("CSVs/1.csv"), Server.MapPath("CSVs/2.csv"), 1);
    bool IsMatchedSecondColumn = GetCSVDiff(Server.MapPath("CSVs/1.csv"), Server.MapPath("CSVs/2.csv"), 2);
}