add method to get all pages from document

src/UglyToad.PdfPig.Tests/Integration/FarmerMacTests.cs

@@ -1,5 +1,6 @@
 namespace UglyToad.PdfPig.Tests.Integration
 {
+    using System.Linq;
     using Xunit;
 
     public class FarmerMacTests
@@ -18,6 +19,17 @@
             }
         }
 
+        [Fact]
+        public void GetPagesWorks()
+        {
+            using (var document = PdfDocument.Open(GetFilename()))
+            {
+                var pageCount = document.GetPages().Count();
+
+                Assert.Equal(5, pageCount);
+            }
+        }
+
         [Fact]
         public void HasCorrectContentAfterReadingPreviousPage()
         {

src/UglyToad.PdfPig/PdfDocument.cs

@@ -1,6 +1,7 @@
 namespace UglyToad.PdfPig
 {
     using System;
+    using System.Collections.Generic;
     using System.IO;
     using AcroForms;
     using Content;
@@ -159,6 +160,17 @@
             }
         }
 
+        /// <summary>
+        /// Gets all pages in this document in order.
+        /// </summary>
+        public IEnumerable<Page> GetPages()
+        {
+            for (var i = 0; i < NumberOfPages; i++)
+            {
+                yield return GetPage(i + 1);
+            }
+        }
+
         /// <summary>
         /// Get the document level metadata if present.
         /// The metadata is XML in the (Extensible Metadata Platform) XMP format.