Error 1 <>f__AnonymousType0`7 List anbieter TextBlock.Text String The property "Anbieter" was not found in the object of type "<>f__AnonymousType0`7".

Error 1 <>f__AnonymousType0`7 List anbieter TextBlock.Text String The property "Anbieter" was not found in the object of type "<>f__AnonymousType0`7".

<Label Target="{Binding ElementName=angebotName}">Anbieter</Label>
                <TextBox Name="anbieter" />

<DataGridTextColumn Header="Anbieter" Binding="{Binding Anbieter}" />

<Label Target="{Binding ElementName=angebotName}">Anbieter</Label>
                <TextBox Name="anbieter" />

<DataGridTextColumn Header="Anbieter" Binding="{Binding Anbieter}" />

VergleichDataGrid.Items.Add(new {
                Anbieter = anbieter.Text,
                Menge = menge.Text,
                Listenpreis = listenpreis.Text,
                Mindermengenzuschlag = mindermengenzuschlag.Text,
                Rabatt = rabatt.Text,
                Skonto = skonto.Text,
                Transportkosten = transportkosten.Text
            });

VergleichDataGrid.Items.Add(new {
                Anbieter = anbieter.Text,
                Menge = menge.Text,
                Listenpreis = listenpreis.Text,
                Mindermengenzuschlag = mindermengenzuschlag.Text,
                Rabatt = rabatt.Text,
                Skonto = skonto.Text,
                Transportkosten = transportkosten.Text
            });