# ConditionalStyle
```csharp
public sealed class ConditionalStyle
```
Namespace `SharpCell` ยท package `SharpCell`
What a conditional format changes about a cell's look, as Excel's Format Cells for a rule sets it: the font's style and colour, the fill, the borders and the number format. A property left null keeps what the cell has. A record: `with` makes a changed copy.
## Constructors
### ConditionalStyle()
```csharp
public ConditionalStyle()
```
A look that changes nothing; set properties in an initializer.
## Properties
### Bold
```csharp
public bool? Bold { get; init; }
```
Bold, or not bold; null keeps the cell's.
### BottomBorder
```csharp
public CellBorder? BottomBorder { get; init; }
```
The bottom border; null keeps the cell's.
### Fill
```csharp
public CellColor? Fill { get; init; }
```
The fill colour; null keeps the cell's.
### FontColor
```csharp
public CellColor? FontColor { get; init; }
```
The text colour; null keeps the cell's.
### GreenFill
```csharp
public static ConditionalStyle GreenFill { get; }
```
A green fill with dark green text.
### Italic
```csharp
public bool? Italic { get; init; }
```
Italic, or not italic; null keeps the cell's.
### LeftBorder
```csharp
public CellBorder? LeftBorder { get; init; }
```
The left border; null keeps the cell's.
### LightRedFill
```csharp
public static ConditionalStyle LightRedFill { get; }
```
A light red fill with dark red text, Excel's first preset.
### NumberFormat
```csharp
public string? NumberFormat { get; init; }
```
The number format code, such as `0.00%`; null keeps the cell's.
### RightBorder
```csharp
public CellBorder? RightBorder { get; init; }
```
The right border; null keeps the cell's.
### Strikethrough
```csharp
public bool? Strikethrough { get; init; }
```
Struck through, or not; null keeps the cell's.
### TopBorder
```csharp
public CellBorder? TopBorder { get; init; }
```
The top border; null keeps the cell's.
### Underline
```csharp
public CellUnderline? Underline { get; init; }
```
The underline; null keeps the cell's.
### YellowFill
```csharp
public static ConditionalStyle YellowFill { get; }
```
A yellow fill with dark yellow text.
## Methods
### ApplyTo(CellStyle)
```csharp
public CellStyle ApplyTo(CellStyle style)
```
The style with what this one sets put over it.
**Parameters**
- `style`: The cell's own style.