Why a comma appears in the file path?

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C#

ASP.NET

Why a comma appears in the file path?

this is the message:
Could not find a part of the path 'C:\Program Files (x86)\Common Files\Microsoft Shared\DevServer\10.0\,\intranet\IPPDRIVE\a\RecepcionMateriaPrima.xls'.


this is the code:

private void DownteFileFolder(string FolderNames)
{

            FileInfo file = new FileInfo(FolderNames);
            //if (file.Exists)
            {
                Response.Clear();
                Response.ClearHeaders();
                Response.ClearContent();
                Response.AddHeader("content-disposition", "attachment; filename=" + FolderNames);
                Response.AddHeader("Content-Type", "application/Excel");
                Response.ContentType = "application/vnd.xls";
                Response.AddHeader("Content-Length", file.ToString());
                //Response.AddHeader("Content-Length", file.Length.ToString());
                Response.WriteFile(file.FullName);
                //Response.WriteFile(file.FullName);
                Response.End();

you should see the following path:

C:\inetpub\wwwroot\intranet\IPPDRIVE\a\RecepcionMateriaPrima.xls