diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..1ff0c42
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,63 @@
+###############################################################################
+# Set default behavior to automatically normalize line endings.
+###############################################################################
+* text=auto
+
+###############################################################################
+# Set default behavior for command prompt diff.
+#
+# This is need for earlier builds of msysgit that does not have it on by
+# default for csharp files.
+# Note: This is only used by command line
+###############################################################################
+#*.cs diff=csharp
+
+###############################################################################
+# Set the merge driver for project and solution files
+#
+# Merging from the command prompt will add diff markers to the files if there
+# are conflicts (Merging from VS is not affected by the settings below, in VS
+# the diff markers are never inserted). Diff markers may cause the following
+# file extensions to fail to load in VS. An alternative would be to treat
+# these files as binary and thus will always conflict and require user
+# intervention with every merge. To do so, just uncomment the entries below
+###############################################################################
+#*.sln merge=binary
+#*.csproj merge=binary
+#*.vbproj merge=binary
+#*.vcxproj merge=binary
+#*.vcproj merge=binary
+#*.dbproj merge=binary
+#*.fsproj merge=binary
+#*.lsproj merge=binary
+#*.wixproj merge=binary
+#*.modelproj merge=binary
+#*.sqlproj merge=binary
+#*.wwaproj merge=binary
+
+###############################################################################
+# behavior for image files
+#
+# image files are treated as binary by default.
+###############################################################################
+#*.jpg binary
+#*.png binary
+#*.gif binary
+
+###############################################################################
+# diff behavior for common document formats
+#
+# Convert binary document formats to text before diffing them. This feature
+# is only available from the command line. Turn it on by uncommenting the
+# entries below.
+###############################################################################
+#*.doc diff=astextplain
+#*.DOC diff=astextplain
+#*.docx diff=astextplain
+#*.DOCX diff=astextplain
+#*.dot diff=astextplain
+#*.DOT diff=astextplain
+#*.pdf diff=astextplain
+#*.PDF diff=astextplain
+#*.rtf diff=astextplain
+#*.RTF diff=astextplain
diff --git a/P009-Palindrome-Number/P009-Palindrome-Number.sln b/P009-Palindrome-Number/P009-Palindrome-Number.sln
new file mode 100644
index 0000000..33aaf96
--- /dev/null
+++ b/P009-Palindrome-Number/P009-Palindrome-Number.sln
@@ -0,0 +1,22 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 15
+VisualStudioVersion = 15.0.26430.14
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "P009-Palindrome-Number", "P009-Palindrome-Number\P009-Palindrome-Number.csproj", "{32C231FA-7FDC-44F1-AC2E-123E0F4D3701}"
+EndProject
+Global
+ GlobalSection(SolutionConfigurationPlatforms) = preSolution
+ Debug|Any CPU = Debug|Any CPU
+ Release|Any CPU = Release|Any CPU
+ EndGlobalSection
+ GlobalSection(ProjectConfigurationPlatforms) = postSolution
+ {32C231FA-7FDC-44F1-AC2E-123E0F4D3701}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+ {32C231FA-7FDC-44F1-AC2E-123E0F4D3701}.Debug|Any CPU.Build.0 = Debug|Any CPU
+ {32C231FA-7FDC-44F1-AC2E-123E0F4D3701}.Release|Any CPU.ActiveCfg = Release|Any CPU
+ {32C231FA-7FDC-44F1-AC2E-123E0F4D3701}.Release|Any CPU.Build.0 = Release|Any CPU
+ EndGlobalSection
+ GlobalSection(SolutionProperties) = preSolution
+ HideSolutionNode = FALSE
+ EndGlobalSection
+EndGlobal
diff --git a/P009-Palindrome-Number/P009-Palindrome-Number/App.config b/P009-Palindrome-Number/P009-Palindrome-Number/App.config
new file mode 100644
index 0000000..88fa402
--- /dev/null
+++ b/P009-Palindrome-Number/P009-Palindrome-Number/App.config
@@ -0,0 +1,6 @@
+
+
+
+
+
+
\ No newline at end of file
diff --git a/P009-Palindrome-Number/P009-Palindrome-Number/P009-Palindrome-Number.csproj b/P009-Palindrome-Number/P009-Palindrome-Number/P009-Palindrome-Number.csproj
new file mode 100644
index 0000000..cc85d14
--- /dev/null
+++ b/P009-Palindrome-Number/P009-Palindrome-Number/P009-Palindrome-Number.csproj
@@ -0,0 +1,53 @@
+
+
+
+
+ Debug
+ AnyCPU
+ {32C231FA-7FDC-44F1-AC2E-123E0F4D3701}
+ Exe
+ P009_Palindrome_Number
+ P009-Palindrome-Number
+ v4.5.2
+ 512
+ true
+
+
+ AnyCPU
+ true
+ full
+ false
+ bin\Debug\
+ DEBUG;TRACE
+ prompt
+ 4
+
+
+ AnyCPU
+ pdbonly
+ true
+ bin\Release\
+ TRACE
+ prompt
+ 4
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/P009-Palindrome-Number/P009-Palindrome-Number/Program.cs b/P009-Palindrome-Number/P009-Palindrome-Number/Program.cs
new file mode 100644
index 0000000..980a0b5
--- /dev/null
+++ b/P009-Palindrome-Number/P009-Palindrome-Number/Program.cs
@@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace P009_Palindrome_Number
+{
+ class Program
+ {
+ static void Main(string[] args)
+ {
+ var solution = new Solution();
+ Console.WriteLine(solution.IsPalindrome(123));
+ Console.WriteLine(solution.IsPalindrome(123321));
+ Console.WriteLine(solution.IsPalindrome(int.MaxValue));
+ Console.ReadLine();
+ }
+ }
+}
diff --git a/P009-Palindrome-Number/P009-Palindrome-Number/Properties/AssemblyInfo.cs b/P009-Palindrome-Number/P009-Palindrome-Number/Properties/AssemblyInfo.cs
new file mode 100644
index 0000000..2ca5839
--- /dev/null
+++ b/P009-Palindrome-Number/P009-Palindrome-Number/Properties/AssemblyInfo.cs
@@ -0,0 +1,36 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// General Information about an assembly is controlled through the following
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+[assembly: AssemblyTitle("P009-Palindrome-Number")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("Xeon Productions")]
+[assembly: AssemblyProduct("P009-Palindrome-Number")]
+[assembly: AssemblyCopyright("Copyright © Xeon Productions 2017")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// Setting ComVisible to false makes the types in this assembly not visible
+// to COM components. If you need to access a type in this assembly from
+// COM, set the ComVisible attribute to true on that type.
+[assembly: ComVisible(false)]
+
+// The following GUID is for the ID of the typelib if this project is exposed to COM
+[assembly: Guid("32c231fa-7fdc-44f1-ac2e-123e0f4d3701")]
+
+// Version information for an assembly consists of the following four values:
+//
+// Major Version
+// Minor Version
+// Build Number
+// Revision
+//
+// You can specify all the values or you can default the Build and Revision Numbers
+// by using the '*' as shown below:
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]
diff --git a/P009-Palindrome-Number/P009-Palindrome-Number/Solution.cs b/P009-Palindrome-Number/P009-Palindrome-Number/Solution.cs
new file mode 100644
index 0000000..7a051fb
--- /dev/null
+++ b/P009-Palindrome-Number/P009-Palindrome-Number/Solution.cs
@@ -0,0 +1,31 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace P009_Palindrome_Number
+{
+ class Solution
+ {
+ /**
+ * 11507 / 11507 test cases passed.
+ * Status: Accepted
+ * Runtime: 122 ms
+ */
+ public bool IsPalindrome(int x)
+ {
+ if (x < 0)
+ return false;
+
+ int y = x, reversed = 0;
+ while (x > 0)
+ {
+ reversed = reversed * 10 + x % 10;
+ x = x / 10;
+ }
+
+ return y == reversed;
+ }
+ }
+}