Indentation for c# functions I am just looking to improve my indentation on my current code. I'd be happy to hear any reviews and improvements.
public class DataAccess
{

    public List&lt;ComplaintModel&gt; GetComplaint(string _OrderNumber)
    {
        throw new NotImplementedException();
    }

    public void InsertComplaint(
        DateTime _Date,
        string _OrderNumber,
        string _CustomerName,
        string _CustomerContactName,
        string _Telephone,
        string _Email,
        string _CustomerReference,
        string _Product,
        string _PackSize,
        string _BatchNumber,
        DateTime _BestBeforeDate,
        string _QuantityInvolved,
        string _Details, 
        string _Comments)
    {
        using(MySqlConnection conn = new MySqlConnection(ConnectionString.ConnString))
        {
            List&lt;ComplaintModel&gt; complaint = new List&lt;ComplaintModel&gt;();

            complaint.Add(new ComplaintModel { Date = _Date,
                OrderNumber = _OrderNumber,
                CustomerName = _CustomerName,
                CustomerContactName = _CustomerContactName,
                Telephone = _Telephone,
                Email = _Email,
                CustomerReference = _CustomerReference,
                Product = _Product,
                PackSize = _PackSize,
                BatchNumber = _BatchNumber,
                BestBeforeDate = _BestBeforeDate,
                QuantityInvolved = _QuantityInvolved,
                Details = _Details,
                Comments = _Comments});

            conn.Execute(@&quot;INSERT INTO customer_complaints 
                        (date_taken, order_number, customer_name, customer_contact, telephone, email, customer_reference, product, pack_size, batch_lot_number,
                        best_before_date, quantity_involved, details, comments) 
                        VALUES (@Date, @OrderNumber, @CustomerName, @CustomerContactName, @Telephone, @Email, @CustomerReference, @Product, @PackSize, @BatchNumber,
                        @BestBeforeDate, @QuantityInvolved, @Details, @Comments)&quot;, complaint);
        }
    }
}
There are two places where I would use var:
var conn = new MySqlConnection(ConnectionString.ConnString)
var complaint = new List&lt;ComplaintModel&gt;();

You no longer have to put braces around a using block, saving you one indentation level:
using var conn = new MySqlConnection(ConnectionString.ConnString);

Don't put the first parameter at the end of the line and the rest on a new line. Put the first parameter on a new line as well:
complaint.Add(new ComplaintModel {
    Date = _Date,
    ...

If you start the Query string on a new line, you can move it back one indentation level:
conn.Execute(
    @&quot;INSERT INTO customer_complaints
    ...