Invalid Token 'String' in class, struct or interface member declaration

Question

I'm having error with my code "Invalid Token 'String' in class, struct or interface member declaration" please help.

private void string InsertRecords(TextBox textboxname, string qryname, string parametername)
{
    string msg;

    if (textboxname.Text != "")
    {
        ConnString conn = new ConnString();
        string MyConn = conn.GetConn(); // Get Connection String

        using (SqlConnection sqlconn = new SqlConnection(MyConn))
        {
            try
            {
                SqlCommand cmd = new SqlCommand();
                cmd.CommandType = CommandType.StoredProcedure;
                cmd.CommandText = qryname;
                cmd.Parameters.AddWithValue("@" + parametername, SqlDbType.VarChar).Value = textboxname.Text;
                cmd.Connection = sqlconn;
                sqlconn.Open();
                cmd.ExecuteNonQuery();

                msg = $"<strong>Record Successfully Added!</strong>";
                return msg;
            }
            catch (Exception ex)
            {
                if (ex.HResult == -2146232060)
                {
                    msg = $"<strong>Record already exist in the database!</strong>";
                    return msg;
                }
                else
                {
                    msg = $"<strong>Error Message: {ex.HResult}</strong>";
                    return msg;
                }
            }
        }
    }
    else
    {
        msg = $"<strong>Please complete required fields</strong>";
        return msg;
    }
}

I'm trying to just return the message string and grab that message once called. thank you!

Answer 1

You can't return string and have no return value (void) at the same time. Since you want to return a value remove void

private string InsertRecords(TextBox textboxname, string qryname, string parametername) { }