diff --git a/DevTips/DevTips/Program.cs b/DevTips/DevTips/Program.cs
index 4595389..9f4bdaf 100644
--- a/DevTips/DevTips/Program.cs
+++ b/DevTips/DevTips/Program.cs
@@ -5,10 +5,18 @@ class Program
 {
     static void Main(string[] args)
     {
-        LinqGroupMinMax.Print();
-        System.Console.WriteLine();
-        LinqGroupMinMax.Client1();
-        System.Console.WriteLine();
-        LinqGroupMinMax.Client2();
+        // LinqGroupMinMax
+        // LinqGroupMinMax.Print();
+        // System.Console.WriteLine();
+        // LinqGroupMinMax.Client1();
+        // System.Console.WriteLine();
+        // LinqGroupMinMax.Client2();
+
+
+        // Action
+        // ActionClient.Client();
+
+        // Func
+        FuncClient.Client();
     }
 }
diff --git a/DevTips/DevTips/Tips/ActionClient.cs b/DevTips/DevTips/Tips/ActionClient.cs
new file mode 100644
index 0000000..8be16ef
--- /dev/null
+++ b/DevTips/DevTips/Tips/ActionClient.cs
@@ -0,0 +1,28 @@
+namespace DevTips.Tips
+{
+    class ActionClient
+    {
+        public static void Client()
+        {
+            // Default
+            Action<string> act = Output;
+            act("Hello");
+
+            // Ananymous method
+            Action<string, string> act2 = delegate (string msg, string title)
+            {
+                System.Console.WriteLine($"[{title}] msg");
+            };
+            act2("No data found", "Error");
+
+            // Lambda
+            Action<int> act3 = (code) => Console.WriteLine($"Code: {code}");
+            act3(505);
+        }
+
+        private static void Output(string msg)
+        {
+            System.Console.WriteLine(msg);
+        }
+    }
+}
\ No newline at end of file
diff --git a/DevTips/DevTips/Tips/FuncClient.cs b/DevTips/DevTips/Tips/FuncClient.cs
new file mode 100644
index 0000000..d8fc650
--- /dev/null
+++ b/DevTips/DevTips/Tips/FuncClient.cs
@@ -0,0 +1,32 @@
+namespace DevTips.Tips
+{
+    class FuncClient
+    {
+        private static int _state;
+
+        public static void Client()
+        {
+            // Default
+            Func<bool> func1 = IsValid;
+            System.Console.WriteLine(func1());
+
+            // Ananymous method
+            Func<bool> func2 = delegate
+            {
+                return _state == 0;
+            };
+            System.Console.WriteLine(func2());
+
+
+            // Lambda
+            Func<bool> func3 = () => _state == 0;
+            System.Console.WriteLine(func3());
+
+        }
+
+        private static bool IsValid()
+        {
+            return _state == 0;
+        }
+    }
+}
\ No newline at end of file