net core handle file upload from angular

HTML
<button style="margin-bottom:10px;" mat-raised-button color="accent" (click)="fileUpload.click()">
  {{ 'BUYER.UPLOAD_BUTTON' | translate }}
</button>
<input hidden type="file" id="fileToUpload" #fileUpload multiple (change)="handleFileInput($event)"
  accept="application/vnd.openxmlformats-officedocument.spreadsheetml.sheet, application/vnd.ms-excel" />

TS
  handleFileInput(event) {
    swal({
      title: "Are you Sure",
      type: "warning",
      text: "You want to Upload?",
      confirmButtonText: "Yes, upload it!?",
      showCancelButton: true
    }).then(result => {
      if (result.value) {
        this.loaderService.display(true);
        if (event.target.files && event.target.files.length > 0) {
          this.fileToUpload = <Array<File>>event.target.files;
          debugger;
          const fileToUploadForm = new FormData();

          if (this.fileToUpload) {
            Array.from(this.fileToUpload).forEach(e => {
              fileToUploadForm.append("files", e);
            });

            this.service.uploadToDatabase(fileToUploadForm).subscribe(
              data => {
                this.loaderService.display(false);
                swal({
                  title: "File Upload with the result as follows:",
                  type: "success",
                  html:
                    '<table cellspacing="15" cellpadding="6" style="display:block;margin-left:auto;margin-right:auto; width:60%">' +
                    '<tr><td style="background-color:#5ab857"><span style="color:white;">' +
                    data[0] +
                    " SUCCESSFULLY INSERTED</span></td></tr>" +
                    '<tr><td style="background-color:#dcb455"><span style="color:white;">' +
                    data[1] +
                    " DUPLICATE RECORD</span></td></tr>" +
                    '<tr><td style="background-color:#ED1C24"><span style="color:white;">' +
                    data[2] +
                    " ERROR IN INSERTING</span><td></tr></table>",
                  confirmButtonText: "OK"
                }).then(result2 => {
                  if (result2.value) {
                    setTimeout(_ => this.applyFilter(), 0);
                  }
                });
              },
              error => {
                this.loaderService.display(false);
                swal(
                  "Error",
                  "Invalid file Format or System Error!<br/> " + error,
                  "error"
                );
                setTimeout(_ => this.applyFilter(), 0);
              }
            );
          }
        }
      }
    });
  }

CS
public async Task<IActionResult> HandleUpload(List<IFormFile> files)
{
foreach (var formFile in files)
{
var filePath = System.IO.Path.Combine(Directory.GetCurrentDirectory(), "Files_Upload", formFile.FileName);
if (formFile.Length > 0)
{
using (var stream = new FileStream(filePath, FileMode.Create))
{
await formFile.CopyToAsync(stream);
}
}
}
return Ok(new { count = files.Count });         
}