diff --git a/CharExtensions.cs b/CharExtensions.cs
new file mode 100644
index 0000000..c33d60b
--- /dev/null
+++ b/CharExtensions.cs
@@ -0,0 +1,10 @@
+using System;
+namespace sharp.extensions
+{
+	public static class CharExtensions
+	{
+		public static bool isDigit(this char ch){
+			return ((ch >= '0') && (ch <= '9'));
+		}
+	}
+}
diff --git a/sharp.extensions.csproj b/sharp.extensions.csproj
index ba2f16a..8de292c 100644
--- a/sharp.extensions.csproj
+++ b/sharp.extensions.csproj
@@ -39,6 +39,7 @@
     <Compile Include="DataReader.cs" />
     <Compile Include="Tripple.cs" />
     <Compile Include="Tuple.cs" />
+    <Compile Include="CharExtensions.cs" />
   </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
 </Project>
\ No newline at end of file