add more examples to the examples solution

examples/GetFormContents.cs

@@ -0,0 +1,41 @@
+namespace UglyToad.Examples
+{
+    using System;
+    using System.Linq;
+    using PdfPig;
+    using PdfPig.AcroForms.Fields;
+
+    internal static class GetFormContents
+    {
+        public static void Run(string filePath)
+        {
+            using (var document = PdfDocument.Open(filePath))
+            {
+                if (!document.TryGetForm(out var form))
+                {
+                    Console.WriteLine($"No form found in file: {filePath}.");
+                    return;
+                }
+
+                var page1Fields = form.GetFieldsForPage(1);
+
+                foreach (var field in page1Fields)
+                {
+                    switch (field)
+                    {
+                        case AcroTextField text:
+                            Console.WriteLine($"Found text field on page 1 with text: {text.Value}.");
+                            break;
+                        case AcroCheckboxesField cboxes:
+                            Console.WriteLine($"Found checkboxes field on page 1 with {cboxes.Children.Count} checkboxes.");
+                            break;
+                        case AcroListBoxField listbox:
+                            var opts = string.Join(", ", listbox.Options.Select(x => x.Name));
+                            Console.WriteLine($"Found listbox field on page 1 with options: {opts}.");
+                            break;
+                    }
+                }
+            }
+        }
+    }
+}