c# No overload matches delegate 'RoutedEventHandler'

I’m trying to figure out how to fix this issue but I’m not really sure on what needs to be changed,

Here is the code:

private void UploadData_Click(object sender, RoutedEventArgs e)
        {
            string connectionstring = @"{serverconnectionstring};";
            using (SqlBulkCopy bcp = new SqlBulkCopy(connectionstring))
            {
                using (var p = new ChoCSVReader(mainFile).WithFirstLineHeader())
                {
                    bcp.DestinationTableName = "ReceiptDemo";
                    bcp.EnableStreaming = true;
                    bcp.BatchSize = 10000;
                    bcp.BulkCopyTimeout = 0;
                    bcp.NotifyAfter = 100;
                    bcp.SqlRowsCopied += delegate (object sender,SqlRowsCopiedEventArgs e)
                    {
                        Console.WriteLine(e.RowsCopied.ToString("#,##0") + " rows copied.");
                    };
                    bcp.WriteToServer(p.AsDataReader());
                }

            }
        }

The error I’m getting is:

Severity    Code    Description Project File    Line    Suppression State
Error   CS0123  No overload for 'UploadData_Click' matches delegate 'RoutedEventHandler'    Rceipt  C:\Users\user\Documents\ReceiptApp\Rceipt\MainWindow.xaml   17  Active

Severity    Code    Description Project File    Line    Suppression State
Error   CS0136  A local or parameter named 'sender' cannot be declared in this scope because that name is used in an enclosing local scope to define a local or parameter       C:\Users\user\Documents\ReceiptApp\Rceipt\MainWindow.xaml.cs    84  

>Solution :

Let’s start with the second error: This happens because your delegate in bcp.SqlRowsCopied += delegate (object sender,SqlRowsCopiedEventArgs e) has a arguments named sender and e which are equal to an enclosing method’s arguments. Rename both arguments to something else.

The first error is probably a followup. Unless you have manually edited the method declaration, it should automatically be created when you added the event handler in the XAML editor.