Update README.md

Author: osuritz

README.md

@@ -1,3 +1,20 @@
 # PNGNormalizer
 
 Provides PNG normalization for files that have been crushed, especially PNGs optimized for iOS with Apple's version of pngcrush.
+
+## How To Use
+This example shows how to read a crushed PNG, named *[email protected]*, and save a normalized version as *[email protected]*.
+
+```C#
+    // Get crushed PNG file as a byte array
+    byte[] sourcePngData = System.IO.File.ReadAllBytes("[email protected]");
+  
+    // Parse the crushed data
+    var png = new PngFile(sourcePngData);
+    
+    // Get the normalized PNG data
+    byte[] normalizedPngData = png.Data;
+    
+    // Save the normalized file
+    System.IO.File.WriteAllBytes("[email protected]", normalizedPngData);
+```