# LastIndexOf()

{% code title="Declaration" %}

```csharp
public static int LastIndexOf(this StringBuilder sb, char character)
```

{% endcode %}

{% code title="Example" %}

```csharp
var sb = new StringBuilder();

sb.Append("Code is like humor.");

var index = sb.LastIndexOf('.'); // 18

sb.AppendLine("When you have to explain it,");

index = sb.LastIndexOf(','); // 46

sb.Append("it’s bad.");

index = sb.LastIndexOf('’'); //51

index = sb.LastIndexOf('^'); // -1
```

{% endcode %}