PictureBox NeoPixel = new PictureBox();
NeoPixel.SizeMode = PictureBoxSizeMode.StretchImage;
Bitmap ImageNeoPixel = new Bitmap("NeoPixel.jpg");
NeoPixel.ClientSize = new Size(400,254);
NeoPixel.Image = ImageNeoPixel;
RichTextBoxAufbauanleitung.Controls.Add(NeoPixel);

Clipboard.SetImage(Image.FromFile("NeoPixel.jpg"));
DataFormats.Format myFormat = DataFormats.GetFormat(DataFormats.Bitmap);
if (RichTextBoxAufbauanleitung.CanPaste(myFormat))
{
      RichTextBoxAufbauanleitung.Paste(myFormat);
}
else
{
      MessageBox.Show("Datenformat funktioniert nicht.");
}

        private void DataGridViewFarbe_CellValidating(object sender, DataGridViewCellValidatingEventArgs e)
        {
            if (DataGridViewFarbe.Columns[e.ColumnIndex] == DataGridViewFarbe.Columns["Farbname"])
            {
                string patternFarbname = @"^[a-zäöüA-ZÄÖÜ0-9](( |-)?[a-zßäöüA-ZÄÖÜ0-9])*$";
                MatchCollection match = Regex.Matches(e.FormattedValue.ToString(), patternFarbname);
                if (match.Count > 0)
                {
                    return;
                }
                else
                {
                    MessageBox.Show("Fehler: #" + e.FormattedValue.ToString() + "# nicht erlaubt");
                    e.Cancel = true;
                    return;
                }
            }
            return;
        }

        private void DataGridViewFarbe_CellValidating(object sender, DataGridViewCellValidatingEventArgs e)
        {
            if (DataGridViewFarbe.Columns[e.ColumnIndex] == DataGridViewFarbe.Columns["Farbname"])
            {
                string patternFarbname = @"^[a-zäöüA-ZÄÖÜ0-9](( |-)?[a-zßäöüA-ZÄÖÜ0-9])*$";
                MatchCollection match = Regex.Matches(DataGridViewFarbe.CurrentCell.Value.ToString(), patternFarbname);
                if (match.Count > 0)
                {
                    return;
                }
                else
                {
                    MessageBox.Show("Fehler: #" + DataGridViewFarbe.CurrentCell.Value.ToString() + "# nicht erlaubt");
                    return;
                }
            }
            return;
        }

            BindingList<Timing> source = new BindingList<Timing>(Timings);
            BindingSourceTiming.DataSource = source;
            if (BindingSourceTiming.SupportsSorting != true)
            {
                MessageBox.Show(" no SupportsSorting");  // ergibt no SupportsSorting
            }

        private void ComboBoxTimingSortieren_SelectedIndexChanged(object sender, EventArgs e)
        {
            BindingSourceTiming.DataSource = Timings;
            if (BindingSourceTiming.SupportsSorting != true)
            {
                MessageBox.Show(" no SupportsSorting");
            }
            switch (ComboBoxTimingSortieren.SelectedItem.ToString())
            {
                case "Uhrzeit, Led und Relais gemischt":
                    BindingSourceTiming.Sort = "Uhrzeit ASC";
                    break;
                case "Uhrzeit Led, dann Uhrzeit Relais":
                    BindingSourceTiming.Sort = "Typ ASC, Uhrzeit ASC";
                    break;
                case "Uhrzeit Relais, dann Uhrzeit Led":
                    BindingSourceTiming.Sort = "Typ DESC, Uhrzeit ASC";
                    break;
                case "Led Uhrzeit, dann Relais Uhrzeit":
                    BindingSourceTiming.Sort = "Uhrzeit ASC, Typ ASC";
                    break;
                case "Relais Uhrzeit, dann Led Uhrzeit":
                    BindingSourceTiming.Sort = "Uhrzeit ASC, Typ DESC";
                    break;
                 default:
                    BindingSourceTiming.Sort = "Uhrzeit ASC";
                    break;
            }
        }

public List<Timing> Timings; 

BindingSourceTiming.EndEdit();
BindingSourceTiming.DataSource = Timings;

private void DataGridViewTiming_DataBindingComplete(object sender, DataGridViewBindingCompleteEventArgs e)
{
    BindingSourceTiming.DataSource = Timings;
    ...

        private void DataGridViewTiming_DataBindingComplete(object sender, DataGridViewBindingCompleteEventArgs e)
        {
            for (int loop = 0; loop < Timings.Count; loop++)
            {
                DataGridViewComboBoxCell cbCellNumBesch = (DataGridViewComboBoxCell)DataGridViewTiming.Rows[loop].Cells[3];
                DataGridViewComboBoxCell cbCellNummer = (DataGridViewComboBoxCell)DataGridViewTiming.Rows[loop].Cells[2];
                if (Timings[loop].Typ == Lichtquelle.Relais)
                {
                    if (cbCellNumBesch != null)
                    {
                        cbCellNumBesch.DataSource = BindingSourceRelais;
                        cbCellNumBesch.DisplayMember = "RelaisNumBesch";
                        cbCellNumBesch.ValueMember = "RelaisNumBesch";
                    }
                    if (cbCellNummer != null)
                    {
                        cbCellNummer.DataSource = BindingSourceRelais;
                        cbCellNummer.DisplayMember = "RelaisNummer";
                        cbCellNummer.ValueMember = "RelaisNummer";
                    }
                }
                else
                {
                    if (cbCellNumBesch != null)
                    {
                        cbCellNumBesch.DataSource = BindingSourceLed;
                        cbCellNumBesch.DisplayMember = "LedNumBesch";
                        cbCellNumBesch.ValueMember = "LedNumBesch";
                    }
                    if (cbCellNummer != null)
                    {
                        cbCellNummer.DataSource = BindingSourceLed;
                        cbCellNummer.DisplayMember = "LedNummer";
                        cbCellNummer.ValueMember = "LedNummer";
                    }
                }
                DataGridViewTiming.DataSource = BindingSourceTiming;
            }
        }

        private void DataGridViewTiming_DragDrop(object sender, DragEventArgs e)
        {
            Point clientPoint = DataGridViewTiming.PointToClient(new Point(e.X, e.Y));
            rowIndexOfItemUnderMouseToDropTiming = DataGridViewTiming.HitTest(clientPoint.X, clientPoint.Y).RowIndex;
            if (e.Effect == DragDropEffects.Move)
            {
                rowIndexFromMouseDownTiming = BindingSourceTiming.Position;
                BindingSourceTiming.Insert(rowIndexOfItemUnderMouseToDropTiming, BindingSourceTiming.Current);
                if (rowIndexFromMouseDownTiming > rowIndexOfItemUnderMouseToDropTiming)
                {
                    BindingSourceTiming.RemoveAt(rowIndexFromMouseDownTiming + 1);
                    BindingSourceTiming.Position = rowIndexOfItemUnderMouseToDropTiming;
                }
                else
                {
                    BindingSourceTiming.RemoveAt(rowIndexFromMouseDownTiming);
                    BindingSourceTiming.Position = rowIndexOfItemUnderMouseToDropTiming - 1;
                }
                BindingSourceTiming.EndEdit();
            }
        }

        private void ComboBoxTimingSortieren_SelectedIndexChanged(object sender, EventArgs e)
        {
            IEnumerable<Timing> timingsortierungQuery;
            switch (ComboBoxTimingSortieren.SelectedItem.ToString())
            {
                case "Uhrzeit, Led und Relais gemischt":
                    timingsortierungQuery =
                        from tq in Timings
                        orderby tq.Uhrzeit ascending
                        select tq;
                    break;
                case "Uhrzeit Led, dann Uhrzeit Relais":
                    timingsortierungQuery =
                        from tq in Timings
                        orderby tq.Typ ascending
                        orderby tq.Uhrzeit ascending
                        select tq;
                    break;
                case "Uhrzeit Relais, dann Uhrzeit Led":
                    timingsortierungQuery =
                        from tq in Timings
                        orderby tq.Typ descending
                        orderby tq.Uhrzeit ascending
                        select tq;
                    break;
                case "Led Uhrzeit, dann Relais Uhrzeit":
                    timingsortierungQuery =
                        from tq in Timings
                        orderby tq.Uhrzeit ascending
                        orderby tq.Typ ascending
                        select tq;
                    break;
                case "Relais Uhrzeit, dann Led Uhrzeit":
                    timingsortierungQuery =
                        from tq in Timings
                        orderby tq.Uhrzeit ascending
                        orderby tq.Typ descending
                        select tq;
                    break;
                default:
                    timingsortierungQuery =
                        from tq in Timings
                        orderby tq.Uhrzeit ascending
                        select tq;
                    break;
            }
            BindingSourceTiming.DataSource = timingsortierungQuery.ToList();
        }

        private void ButtonDGVInhalt_Click(object sender, EventArgs e)
        {
            for (int loop = 0; loop< Timings.Count; loop++)
            {
                MessageBox.Show(DataGridViewTiming.Rows[loop].Cells["Uhrzeit"].Value + ", "
                    + DataGridViewTiming.Rows[loop].Cells["Typ"].Value + ", "
                    + DataGridViewTiming.Rows[loop].Cells["Nummer"].Value.ToString() + ", "
                    + DataGridViewTiming.Rows[loop].Cells["NumBesch"].Value + ", "
                    + DataGridViewTiming.Rows[loop].Cells["Zustand"].Value);
            }
        }

       private void DataGridViewTiming_CurrentCellDirtyStateChanged(object sender, EventArgs e)
        {
            if (DataGridViewTiming.IsCurrentCellDirty)
            {
                DataGridViewTiming.CommitEdit(DataGridViewDataErrorContexts.Commit);
            }
        }

        private void DataGridViewTiming_DataError(object sender, DataGridViewDataErrorEventArgs e)
        {
            if (e.Exception.Message == "Der DataGridViewComboBoxCell-Wert ist ungültig.")
            {
                object value = DataGridViewTiming.Rows[e.RowIndex].Cells[e.ColumnIndex].Value;
                if (!((DataGridViewComboBoxColumn)DataGridViewTiming.Columns[e.ColumnIndex]).Items.Contains(value))
                {
                    ((DataGridViewComboBoxColumn)DataGridViewTiming.Columns[e.ColumnIndex]).Items.Add(value);
                }
            }
        }

           Timings = inOut.ReadTiming(Timings, Presettings);
            BindingSourceTiming.DataSource = Timings;
...
            DataGridViewTiming.Columns[2].Name = "Nummer";
            DataGridViewTiming.Columns[3].Name = "NumBesch";
...
            DataGridViewTiming.DataBindingComplete += new DataGridViewBindingCompleteEventHandler(DataGridViewTiming_DataBindingComplete);

        private void DataGridViewTiming_DataBindingComplete(object sender, DataGridViewBindingCompleteEventArgs e)
        {
            for (int loop = 0; loop < Timings.Count; loop++)
            {
                DataGridViewComboBoxCell cbCell = (DataGridViewComboBoxCell)DataGridViewTiming.Rows[loop].Cells["NumBesch"];
                if (Timings[loop].Typ == Lichtquelle.Relais)
                {
                    Timings[loop].Nummer = Relaises[Timings[loop].Nummer].RelaisNummer;
                    Timings[loop].NumBesch = Relaises[Timings[loop].Nummer].RelaisNumBesch;
                    if (cbCell != null)
                    {
                        cbCell.DataSource = BindingSourceRelais;
                        cbCell.DisplayMember = "RelaisNumBesch";
                        cbCell.ValueMember = "RelaisNummer";
                    }
                }
                else
                {
                    Timings[loop].Nummer = Leds[Timings[loop].Nummer].LedNummer;
                    Timings[loop].NumBesch = Leds[Timings[loop].Nummer].LedNumBesch;
                    if (cbCell != null)
                    {
                        cbCell.DataSource = BindingSourceLed;
                        cbCell.DisplayMember = "LedNumBesch";
                        cbCell.ValueMember = "LedNummer";
                    }
                }
            }
        }

        private void DataGridViewTiming_DataError(object sender, DataGridViewDataErrorEventArgs e)
        {
        }

IBindingList<Timing> source = new BindingList<Timing>(Timings);

BindingList<Timing> source = new BindingList<Timing>(Timings);

IBindingList source = new BindingList<Timing>(Timings);

IBindingList source = new BindingList<T>(Timings);

using System.ComponentModel;
using System.Collection.Generic;

public class Timing
{
... Konstruktoren
}

public List<Timing> Timings;

IBindingList source = new BindingList<T>(datasource);

            var timingQuery =
                from tq in Timings
                join lq in Leds on tq.Nummer equals lq.Nummer
                where tq.Typ.Equals(Lichtquelle.Led)
                join rq in Relaises on tq.Nummer equals rq.Nummer
                where tq.Typ.Equals(Lichtquelle.Relais)
                select tq;
            BindingSourceTiming.DataSource = timingQuery.ToList();

    public class Timing
    {
        private string _uhrzeit;

        public Timing()
        {
        }

        public Timing(int tagminute, Lichtquelle typ, int nummer, BZustand zustand)
        {
            Tagminute = tagminute;
            Typ = typ;
            Nummer = nummer;
            Zustand = zustand;
        }

        public int Tagminute
        {
            get => UhrzeitToTotalmin(_uhrzeit);
            set => _uhrzeit = TotalminToUhrzeit(value);
        }
        public Lichtquelle Typ { get; set; }
        public int Nummer { get; set; }
        public BZustand Zustand { get; set; }
    }

            DataGridViewTextBoxColumn dgvTextUhrzeit = new DataGridViewTextBoxColumn()
            {
                HeaderText = "Uhrzeit",
                DataPropertyName = "Tagminute",
            };