formatting-culture-aware-data

# Culture-Aware Data Formatting in WPF

Format dates, numbers, and currency based on user's culture preferences.

## 1. Culture Formatting Overview

| Data Type | en-US | ko-KR | de-DE |
|-----------|-------|-------|-------|
| Date (d) | 1/21/2026 | 2026-01-21 | 21.01.2026 |
| Currency (C) | $1,234.56 | ₩1,235 | 1.234,56 € |
| Number (N2) | 1,234.56 | 1,234.56 | 1.234,56 |
| Percent (P) | 75.00% | 75.00% | 75,00 % |

---

## 2. XAML Formatting

### 2.1 Date Formatting

```xml
<!-- Short date (culture-aware) -->
<TextBlock Text="{Binding Date, StringFormat={}{0:d}}"/>

<!-- Long date -->
<TextBlock Text="{Binding Date, StringFormat={}{0:D}}"/>

<!-- Custom format (not culture-aware) -->
<TextBlock Text="{Binding Date, StringFormat={}{0:yyyy-MM-dd}}"/>

<!-- Date and time -->
<TextBlock Text="{Binding Date, StringFormat={}{0:g}}"/>
```

### 2.2 Number Formatting

```xml
<!-- Number with 2 decimal places -->
<TextBlock Text="{Binding Amount, StringFormat={}{0:N2}}"/>

<!-- Number with no decimals -->
<TextBlock Text="{Binding Count, StringFormat={}{0:N0}}"/>

<!-- Fixed decimal places -->
<TextBlock Text="{Binding Value, StringFormat={}{0:F2}}"/>
```

### 2.3 Currency Formatting

```xml
<!-- Currency (culture-aware symbol and format) -->
<TextBlock Text="{Binding Price, StringFormat={}{0:C}}"/>

<!-- Currency with no decimals -->
<TextBlock Text="{Binding Price, StringFormat={}{0:C0}}"/>
```

### 2.4 Percent Formatting

```xml
<!-- Percent (multiplies by 100) -->
<TextBlock Text="{Binding Rate, StringFormat={}{0:P}}"/>

<!-- Percent with 1 decimal -->
<TextBlock Text="{Binding Rate, StringFormat={}{0:P1}}"/>
```

---

## 3. Code Formatting

### 3.1 Using Current Culture

```csharp
// Uses Thread.CurrentThread.CurrentCulture
var dateStr = DateTime.Now.ToString("d");
var currencyStr = price.ToString("C");
var numberStr = amount.ToString("N2");
```

### 3.2 Specific Culture

```csharp
var koKr = new CultureInfo("ko-KR");
var deDE = new CultureInfo("de-DE");

// Korean for