30 lines
977 B
Markdown
30 lines
977 B
Markdown
---
|
||
title: First
|
||
---
|
||
|
||
# First
|
||
|
||
Returns the first element that satisfies an optional given condition. If no element is found, throws an ```InvalidOperationException```;
|
||
|
||
### Signature
|
||
```csharp
|
||
Enumerable.First<TSource>(IEnumerable<TSource>, Func<TSource, Boolean>)
|
||
```
|
||
|
||
## Example
|
||
```csharp
|
||
var fruits = new List<Fruit>() {
|
||
new Fruit() { Id = 1, Name = "Orange", Color = "Orange", Quantity: 3 },
|
||
new Fruit() { Id = 2, Name = "Strawberry", Color = "Red", Quantity: 12 },
|
||
new Fruit() { Id = 3, Name = "Grape", Color = "Purple", Quantity: 25 },
|
||
new Fruit() { Id = 4, Name = "Pineapple", Color = "Yellow", Quantity: 1 },
|
||
new Fruit() { Id = 5, Name = "Apple", Color = "Red", Quantity: 5 },
|
||
new Fruit() { Id = 6, Name = "Mango", Color = "Yellow", Quantity: 2 }
|
||
};
|
||
|
||
var firstFruit = fruits.First(); // Orange
|
||
|
||
var firstYellowFruit = fruits.First(f => f.Color == "Yellow"); // Pineapple
|
||
```
|
||
|