Translate comments in code to Spanish (#20142)

Translate comments in code to Spanish

guide/spanish/csharp/linq/first-or-default/index.md

@@ -1,30 +1,33 @@
 ---
 title: First Or Default
 localeTitle: Primero o predeterminado
----
-# FirstOrDefault
-
-Devuelve el primer elemento que satisface una condición dada opcional. Si no se encuentra ningún elemento, se devuelve el `default()` del objeto.
-
-### Firma
-
-```csharp
-Enumerable.FirstOrDefault<TSource>(IEnumerable<TSource>, Func<TSource, Boolean>) 
-```
-
-## Ejemplo
-
-```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.FirstOrDefault(); // Orange 
- 
- var firstYellowFruit = fruits.FirstOrDefault(f => f.Color == "Green"); // null 
-
+---
+# FirstOrDefault
+
+Devuelve el primer elemento que satisface una condición dada opcional. Si no se encuentra ningún elemento, se devuelve el `default()` del objeto.
+
+### Firma
+
+```csharp
+Enumerable.FirstOrDefault<TSource>(IEnumerable<TSource>, Func<TSource, Boolean>) 
+```
+
+## Ejemplo
+
+```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   } 
+ }; 
+ 
+ // Obtiene la primer fruta, si el enumerable esta vacio, regresa null
+ var firstFruit = fruits.FirstOrDefault(); // Orange 
+ 
+ // Obtiene la primer fruta de color verde, si no encuentra ninguna fruta, regresa null
+ var firstYellowFruit = fruits.FirstOrDefault(f => f.Color == "Green"); // null 
+
+```