# Application Switches

<mark style="color:green;background-color:green;">Since 3.5.6</mark>

Some default behaviors in Wisej.NET are configurable with [`AppContext`](https://learn.microsoft.com/en-us/dotnet/fundamentals/runtime-libraries/system-appcontext) switches. These are the switches currently supported:

## Label Self Size

**`LabelSelfSize`** (default: `true`)

The behavior of `AutoSize` in `Label` controls differs from other controls, especially in standard containers like `Panel`, `Form`, `Page`, or `GroupBox`. When a `Label` is right-anchored in these containers, `AutoSize` adjusts width while maintaining the left position. This ensures the `Label` expands/contracts rightward without moving its left edge.

When the `Label` is in a custom layout container (`FlexLayoutPanel`, `FlowLayoutPanel`, `TableLayoutPanel`), `AutoSize` behaves like other controls.

Corresponds to `Label.SelfSizeDefault` and `Label.SelfSize`.

## DataGridView Auto Select

**`DataGridViewAutoSelectFirstRow`** (default: `true`)

By default, setting the current cell in a `DataGridView` selects the row, cell, or column based on `SelectionMode`. To prevent automatic selection when setting the current cell, set `DataGridViewAutoSelectFirstRow` to `false`.

Corresponds to `DataGridView.AutoSelectFirstRowDefault` and `DataGridView.AutoSelectFirstRow`.

## DataGridView Auto Generate

**`DataGridViewAutoGenerateColumns`** (default: `true`)

The `DataGridView` automatically generates columns when `DataSource` is assigned in the designer, then sets `AutoGenerateColumns` to `false` after creating and serializing columns. Setting `DataSource` to null resets `AutoGenerateColumns` to `true`.

You cannot set `AutoGenerateColumns` in the designer as it's managed with the `DataSource` property. However, you can set its default initial value to `false` using the `DataGridViewAutoGenerateColumns` switch.

Corresponds to `DataGridView.AutoGenerateColumnsDefault`.

## Form Auto Close

**`FormAutoCloseModalDialog`** (default: `false`)

In Wisej.NET, modal dialogs require calling `Close()` to close. Setting `AutoCloseModalDialog` to `true` enables automatic closure when `Form.DialogResult` is set to any value except `DialogResult.None`.

When `AutoCloseModalDialog` is `true`, the dialog closes automatically when:

* User clicks `AcceptButton` or `CancelButton` with `DialogResult` set
* Code sets the `DialogResult` property

This matches WinForms behavior but differs from Wisej.NET's default.

Corresponds to `Form.AutoCloseModalDialogDefault` and `Form.AutoCloseModalDialog`.

## Setting AppContext Switches

See Microsoft's [`System.AppContext`](https://learn.microsoft.com/en-us/dotnet/fundamentals/runtime-libraries/system-appcontext) documentation for various configuration approaches. Example code setup:

{% tabs %}
{% tab title="C#" %}

```csharp
// Program static contstructor
public static class Program {
    
    public void static Program() {
        AppContext.SetSwitch("LabelSelfSize", false);
    }
}
```

{% endtab %}

{% tab title="VB.NET" %}

```vbnet
'' Program static constructor
Module Program
    
    Sub New()
        AppContext.SetSwitch("LabelSelfSize", False)
    End Sub

End Module
```

{% endtab %}
{% endtabs %}