How to set focus on a next entry control dynamicaaly???

In my case, I have a dynamically created entry in a grid. I want to set focus on the next entry. Can someone help me out on this?

`if ((donationTypeList != null) && (donationTypeList.Count() > 0))
{
foreach (var item in donationTypeList)
{
var frame = new Frame();

                var stacklayout = new StackLayout() { Orientation = StackOrientation.Vertical };
                var grid = new Grid();

                var label = new Label() { Text = item.name, ClassId = "1" };
                var xentry = new XEntry() { VerticalOptions = LayoutOptions.End, PlaceholderColor = Color.Black, Placeholder = Constants.ZeroDollar, FontSize = 14, HeightRequest = 50, TextColor = Color.Black };
                xEntries.Add(xentry);
                grid.RowDefinitions.Add(new RowDefinition { Height = new GridLength(1, GridUnitType.Star) });
                grid.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(1, GridUnitType.Star) });
                grid.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(1, GridUnitType.Star) });

                grid.Children.Add(label, 0, 0);
                grid.Children.Add(xentry, 1, 0);

                stacklayout.Children.Add(grid);
                frame.Content = stacklayout;

                customizedFlexlayout.Children.Add(frame);

                if (item.amount != null && Convert.ToDouble(item.amount) != 0)
                {
                    xentry.Text = Constants.Dollar + item.amount;
                    frame.BackgroundColor = Color.FromHex("#0383BE");
                    label.TextColor = Color.White;
                }

                xentry.Focused += (s, e) =>
                {
                    frame.BackgroundColor = Color.FromHex("#054a90");
                    label.TextColor = Color.White;
                };

                xentry.TextChanged += (s, e) =>
                {
                    string text = xentry.Text;
                    if (text.Contains('.'))
                    {
                        int count = text.Length - text.IndexOf(".") - 1;
                        if (count > 2)
                            xentry.Text = text.Substring(0, text.Length - 1);
                    }
                };

                xentry.Unfocused += (s, e) =>
                {
                    donationCatButtons.IsEnabled = false;
                    if (!string.IsNullOrEmpty(xentry.Text))
                    {
                        if ((xentry.Text == Constants.ZeroDollar) || (Convert.ToDouble(xentry.Text.Trim('$')) == 0))
                        {
                            frame.BackgroundColor = Color.FromHex("#EEEFEF");
                            label.TextColor = Color.FromHex("#054A90");
                            item.amount = 0.ToString();
                            xentry.Text = "";
                        }
                        else
                        {
                            frame.BackgroundColor = Color.FromHex("#0383BE");
                            label.TextColor = Color.White;
                            if (item.fundsMaxLimit != "" && Convert.ToDouble(item.fundsMaxLimit) > 0 && Convert.ToDouble(xentry.Text.Trim('$')) > Convert.ToDouble(item.fundsMaxLimit))
                            {
                                DisplayAlert(Constants.MaxLimitTitle, "You can not donate more than $" + item.fundsMaxLimit + " for " + item.name + ".", Constants.Ok);
                                item.amount = string.Format("{0:F2}", Convert.ToDouble(xentry.Text.Trim('$').TrimStart(new Char[] { '0' })));
                            }
                            else
                                item.amount = string.Format("{0:F2}", Convert.ToDouble(xentry.Text.Trim('$').TrimStart(new Char[] { '0' })));
                            xentry.Text = Constants.Dollar + item.amount;
                        }
                    }
                    else
                    {
                        xentry.Text = Constants.ZeroDollar;
                        item.amount = 0.ToString();
                        frame.BackgroundColor = Color.FromHex("#EEEFEF");
                        label.TextColor = Color.FromHex("#054A90");
                    }
                    foreach (var designation in donationTypeList)
                    {
                        if (designation.amount != 0.ToString() && designation.amount != null && designation.amount != "")
                            donationCatButtons.IsEnabled = true;
                    }
                    foreach (var designation in donationTypeList)
                    {
                        if (designation.fundsMaxLimit != "" && Convert.ToDouble(designation.fundsMaxLimit) > 0 &&
                            Convert.ToDouble(designation.amount) > Convert.ToDouble(designation.fundsMaxLimit))
                            donationCatButtons.IsEnabled = false;
                    }
                };
            }              
        }
        else
            DisplayNoContentFrame(Constants.NoSearchResultMessage);
    }`