paul-csharp-5.event.md

@@ -204,6 +204,43 @@ Array.ForEach(enumList.ToArray(), (elem) => { Console.WriteLine(elem); });
 ```
 
 # 5. LINQ 기본 문법 정리 
+
+기본적으로 사용되는 LINQ(Language-Integrated Query) 쿼리구문은 아래와 같다.
+```csharp
+var Linq = from 범위변수 in 데이터원본 
+           where 조건(필터)
+           orderby 정렬기준
+           select 최종결과
+
+```
+
+```csharp
+List<int> numbers = new List<int>() { 5, 4, 1, 3, 9, 8, 6, 7, 2, 0 };
+
+// Query #1.
+IEnumerable<int> filteringQuery =
+    from num in numbers
+    where num < 3 || num > 7
+    select num;
+
+// Query #2.
+IEnumerable<int> orderingQuery =
+    from num in numbers
+    where num < 3 || num > 7
+    orderby num ascending
+    select num;
+
+// Query #3.
+string[] groupingQuery = { "carrots", "cabbage", "broccoli", "beans", "barley" };
+IEnumerable<IGrouping<char, string>> queryFoodGroups =
+    from item in groupingQuery
+    group item by item[0];
+
+```
+
+
+LINQ 
+
 `from` : 
 
 `wheer` :