Added OriginalMarkdown Property

Microsoft.Toolkit.Parsers/Markdown/Blocks/CodeBlock.cs

@@ -180,7 +180,10 @@ Or the code block starts and ends with ```
             return new CodeBlock()
             {
                 Text = code.ToString().Trim('\r', '\n'),
-                CodeLanguage = !string.IsNullOrWhiteSpace(codeLanguage) ? codeLanguage.Trim() : null
+                CodeLanguage = !string.IsNullOrWhiteSpace(codeLanguage) ? codeLanguage.Trim() : null,
+
+                // substring to get the parsed codeblock from the full markdown string
+                OriginalMarkdown = markdown.Substring(start, actualEnd - start > 0 ? actualEnd - start : 0)
             };
         }
 

Microsoft.Toolkit.Parsers/Markdown/Blocks/HeaderBlock.cs

@@ -82,6 +82,9 @@ internal static HeaderBlock ParseHashPrefixedHeader(string markdown, int start,
                 end--;
             }
 
+            // substring to get the parsed header from the full markdown string
+            result.OriginalMarkdown = markdown.Substring(start, end - start > 0 ? end - start : 0);
+
             // Parse the inline content.
             result.Inlines = Common.ParseInlineChildren(markdown, pos, end);
             return result;
@@ -144,6 +147,9 @@ internal static HeaderBlock ParseUnderlineStyleHeader(string markdown, int first
             var result = new HeaderBlock();
             result.HeaderLevel = underlineChar == '=' ? 1 : 2;
 
+            // substring to get the parsed header from the full markdown string
+            result.OriginalMarkdown = markdown.Substring(firstLineStart, secondLineEnd - firstLineStart > 0 ? secondLineEnd - firstLineStart : 0);
+
             // Parse the inline content.
             result.Inlines = Common.ParseInlineChildren(markdown, firstLineStart, firstLineEnd);
             return result;

Microsoft.Toolkit.Parsers/Markdown/Blocks/HorizontalRuleBlock.cs

@@ -58,8 +58,13 @@ internal static HorizontalRuleBlock Parse(string markdown, int start, int end)
                 }
             }
 
+            HorizontalRuleBlock result = new HorizontalRuleBlock();
+
+            // substring to get the parsed horizontalrule from the full markdown string
+            result.OriginalMarkdown = markdown.Substring(start, end - start > 0 ? end - start : 0);
+
             // Hopefully there were at least 3 stars/dashes/underscores.
-            return hrCharCount >= 3 ? new HorizontalRuleBlock() : null;
+            return hrCharCount >= 3 ? result : null;
         }
 
         /// <summary>

Microsoft.Toolkit.Parsers/Markdown/Blocks/LinkReferenceBlock.cs

@@ -160,6 +160,10 @@ internal static LinkReferenceBlock Parse(string markdown, int start, int end)
             result.Id = id;
             result.Url = url;
             result.Tooltip = tooltip;
+
+            // substring to get the parsed link from the full markdown string
+            result.OriginalMarkdown = markdown.Substring(start, end - start > 0 ? end - start : 0);
+
             return result;
         }
 

Microsoft.Toolkit.Parsers/Markdown/Blocks/ListBlock.cs

@@ -209,6 +209,9 @@ internal static ListBlock Parse(string markdown, int start, int maxEnd, int quot
             }
 
             var result = russianDolls[0].List;
+
+            // substring to get the parsed list from the full markdown string
+            result.OriginalMarkdown = markdown.Substring(start, actualEnd - start > 0 ? actualEnd - start : 0);
             ReplaceStringBuilders(result);
             return result;
         }

Microsoft.Toolkit.Parsers/Markdown/Blocks/ParagraphBlock.cs

@@ -35,6 +35,9 @@ internal static ParagraphBlock Parse(string markdown)
         {
             var result = new ParagraphBlock();
             result.Inlines = Common.ParseInlineChildren(markdown, 0, markdown.Length);
+
+            // no substring needed here, parsed markdown equals orignal markdown
+            result.OriginalMarkdown = markdown;
             return result;
         }
 

Microsoft.Toolkit.Parsers/Markdown/Blocks/QuoteBlock.cs

@@ -41,6 +41,9 @@ internal static QuoteBlock Parse(string markdown, int startOfLine, int maxEnd, i
             // Recursively call into the markdown block parser.
             result.Blocks = MarkdownDocument.Parse(markdown, startOfLine, maxEnd, quoteDepth: quoteDepth + 1, actualEnd: out actualEnd);
 
+            // substring to get the parsed quote from the full markdown string
+            result.OriginalMarkdown = markdown.Substring(startOfLine, actualEnd - startOfLine > 0 ? actualEnd - startOfLine : 0);
+
             return result;
         }
     }

Microsoft.Toolkit.Parsers/Markdown/Blocks/TableBlock.cs

@@ -53,6 +53,9 @@ internal static TableBlock Parse(string markdown, int start, int endOfFirstLine,
             // interior vertical bars as there are interior vertical bars on the first line.
             actualEnd = start;
 
+            // copy the original start index for the original markdown extraction
+            int origStart = start;
+
             // First thing to do is to check if there is a vertical bar on the line.
             var barSections = markdown.Substring(start, endOfFirstLine - start).Split('|');
 
@@ -160,7 +163,15 @@ internal static TableBlock Parse(string markdown, int start, int endOfFirstLine,
             }
 
             actualEnd = start;
-            return new TableBlock { ColumnDefinitions = columnDefinitions, Rows = rows };
+
+            TableBlock result = new TableBlock();
+            result.ColumnDefinitions = columnDefinitions;
+            result.Rows = rows;
+
+            // substring to get the parsed table from the full markdown string
+            result.OriginalMarkdown = markdown.Substring(origStart, actualEnd - origStart > 0 ? actualEnd - origStart : 0);
+
+            return result;
         }
 
         /// <summary>

Microsoft.Toolkit.Parsers/Markdown/Blocks/YamlHeaderBlock.cs

@@ -134,6 +134,9 @@ internal static YamlHeaderBlock Parse(string markdown, int start, int end, out i
                 return null;
             }
 
+            // substring to get the parsed yaml from the full markdown string
+            result.OriginalMarkdown = markdown.Substring(start, realEndIndex - start > 0 ? realEndIndex - start : 0);
+
             return result;
         }
 

Microsoft.Toolkit.Parsers/Markdown/MarkdownBlock.cs

@@ -14,6 +14,11 @@ public abstract class MarkdownBlock : MarkdownElement
         /// </summary>
         public MarkdownBlockType Type { get; set; }
 
+        /// <summary>
+        /// Gets the original Markdown the element was parsed from.
+        /// </summary>
+        public string OriginalMarkdown { get; internal set; }
+
         /// <summary>
         /// Initializes a new instance of the <see cref="MarkdownBlock"/> class.
         /// </summary>