diff --git a/test/Z.IO.Test/System.IO.FileInfo/FileInfo.CountLines.cs b/test/Z.IO.Test/System.IO.FileInfo/FileInfo.CountLines.cs
new file mode 100644
index 00000000..510eaa8d
--- /dev/null
+++ b/test/Z.IO.Test/System.IO.FileInfo/FileInfo.CountLines.cs
@@ -0,0 +1,41 @@
+// Description: C# Extension Methods Library to enhances the .NET Framework by adding hundreds of new methods. It drastically increases developers productivity and code readability. Support C# and VB.NET
+// Website & Documentation: https://github.com/zzzprojects/Z.ExtensionMethods
+// Forum: https://github.com/zzzprojects/Z.ExtensionMethods/issues
+// License: https://github.com/zzzprojects/Z.ExtensionMethods/blob/master/LICENSE
+// More projects: http://www.zzzprojects.com/
+// Copyright © ZZZ Projects Inc. 2014 - 2016. All rights reserved.
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+
+namespace Z.IO.Test
+{
+    [TestClass]
+    public class System_IO_FileInfo_CountLines
+    {
+        [TestMethod]
+        public void CountLines()
+        {
+            // Type
+            var @this = new FileInfo(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "Examples_System_IO_FileInfo_ReadAllLines.txt"));
+
+            // Intialization
+            using (FileStream stream = @this.Create())
+            {
+                byte[] byteToWrites = Encoding.Default.GetBytes("Fizz" + Environment.NewLine + "Buzz" + Environment.NewLine + "Fizz2");
+                stream.Write(byteToWrites, 0, byteToWrites.Length);
+            }
+
+            // Examples
+            var result1 = @this.CountLines(); // return 3;
+            var result2 = @this.CountLines(x => !x.Contains("Buzz")); // return 2;
+
+            // Unit Test
+            Assert.AreEqual(3, result1);
+            Assert.AreEqual(2, result2);
+        }
+    }
+}
\ No newline at end of file
diff --git a/test/Z.IO.Test/Z.IO.Test.csproj b/test/Z.IO.Test/Z.IO.Test.csproj
index 32275632..da4e1a8f 100644
--- a/test/Z.IO.Test/Z.IO.Test.csproj
+++ b/test/Z.IO.Test/Z.IO.Test.csproj
@@ -86,6 +86,7 @@
     <Compile Include="System.IO.FileInfo\FileInfo.GetDirectoryFullName.cs" />
     <Compile Include="System.IO.FileInfo\FileInfo.GetDirectoryName.cs" />
     <Compile Include="System.IO.FileInfo\FileInfo.GetFileNameWithoutExtension.cs" />
+    <Compile Include="System.IO.FileInfo\FileInfo.CountLines.cs" />
     <Compile Include="System.IO.FileInfo\FileInfo.GetPathRoot.cs" />
     <Compile Include="System.IO.FileInfo\FileInfo.HasExtension.cs" />
     <Compile Include="System.IO.FileInfo\FileInfo.IsPathRooted.cs" />