❔ Simple project with C# windows forms app

Rules of WPF:

❌ Avoid the WPF Designer to eliminate a category of confusing bugs
❌ Don't rely on Margin as the primary tool for layouts
❌ Avoid writing UserControls or subclassing to extend a default control -- use Behaviors instead (Microsoft.Xaml.Behaviors.Wpf)

✅ Write XAML by hand and autoformat with "Ctrl K,D" or XAML Styler
✅ Rely upon XAML Hot Reload to design your app's UI at runtime
✅ Use layout controls (Grid, DockPanel, etc) to support proper resizing
✅ Use data binding to eliminate glue code and state synchronization issues
✅ Use collection controls and DataTemplate to dynamically create lists of controls
✅ Learn MVVM to create maintainable apps
✅ Use the Dispatcher to update controls from non-UI threads
✅ WPF's default controls can be easily modernized via $wpfuilibs
✅ Include relevant XAML, code-behind, and ViewModel code for questions when possible

Rules of WPF:

❌ Avoid the WPF Designer to eliminate a category of confusing bugs
❌ Don't rely on Margin as the primary tool for layouts
❌ Avoid writing UserControls or subclassing to extend a default control -- use Behaviors instead (Microsoft.Xaml.Behaviors.Wpf)

✅ Write XAML by hand and autoformat with "Ctrl K,D" or XAML Styler
✅ Rely upon XAML Hot Reload to design your app's UI at runtime
✅ Use layout controls (Grid, DockPanel, etc) to support proper resizing
✅ Use data binding to eliminate glue code and state synchronization issues
✅ Use collection controls and DataTemplate to dynamically create lists of controls
✅ Learn MVVM to create maintainable apps
✅ Use the Dispatcher to update controls from non-UI threads
✅ WPF's default controls can be easily modernized via $wpfuilibs
✅ Include relevant XAML, code-behind, and ViewModel code for questions when possible

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
            });

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}" />