4.6.2 Collection Initializers

chap04.md

@@ -408,6 +408,22 @@ using(var enumerator = "beer".GetEnumerator())
 
 ### 4.6.2 Collection Initializers
 
+*Instantiation* and *population* of an enumerable object can be done in single step
+
+e.g. compiler translation of instantiation and population of enumerable object
+```csharp
+using System.Collections.Generic;
+...
+List<int> list = new List<int> {1,2,3};
+
+// which is translated into
+List<int> list = new List<int>();
+list.Add(1);
+list.Add(2);
+```
+
+The translation (by compiler) requires enumerable object implements the `System.Collections.IEnumerable` interface, which has `Add` method.
+
 ### 4.6.3 Iterators
 
 ### 4.6.4 Iterator Semantics