Handle edge case with tables

Author: jasonjoh

.vscode/launch.json

@@ -10,7 +10,7 @@
       "request": "launch",
       "preLaunchTask": "build",
       // If you have changed target frameworks, make sure to update the program path.
-      "program": "${workspaceFolder}/src/bin/Debug/net8.0/GenerateTOC.dll",
+      "program": "${workspaceFolder}/src/bin/Debug/net10.0/GenerateTOC.dll",
       "args": [
         "--api-docs",
         "C:/Source/Repos/microsoft-graph-docs/api-reference/v1.0/api",
@@ -42,7 +42,7 @@
       "request": "launch",
       "preLaunchTask": "build",
       // If you have changed target frameworks, make sure to update the program path.
-      "program": "${workspaceFolder}/src/bin/Debug/net8.0/GenerateTOC.dll",
+      "program": "${workspaceFolder}/src/bin/Debug/net10.0/GenerateTOC.dll",
       "args": [
         "--api-docs",
         "C:/Source/Repos/microsoft-graph-docs/api-reference/beta/api",
@@ -76,7 +76,7 @@
       "request": "launch",
       "preLaunchTask": "build",
       // If you have changed target frameworks, make sure to update the program path.
-      "program": "${workspaceFolder}/tools/split-toc/bin/Debug/net8.0/SplitTOC.dll",
+      "program": "${workspaceFolder}/tools/split-toc/bin/Debug/net10.0/SplitTOC.dll",
       "args": [
         "--toc",
         "C:/Source/Repos/microsoft-graph-docs/api-reference/beta/toc.yml",
@@ -99,7 +99,7 @@
       "request": "launch",
       "preLaunchTask": "build",
       // If you have changed target frameworks, make sure to update the program path.
-      "program": "${workspaceFolder}/tools/toc-scan/bin/Debug/net8.0/TOCScan.dll",
+      "program": "${workspaceFolder}/tools/toc-scan/bin/Debug/net10.0/TOCScan.dll",
       "args": [
         "--api-docs",
         "C:/Source/Repos/microsoft-graph-docs/api-reference/v1.0/api",
@@ -123,7 +123,7 @@
       "request": "launch",
       "preLaunchTask": "build",
       // If you have changed target frameworks, make sure to update the program path.
-      "program": "${workspaceFolder}/tools/csdl-to-mapping/bin/Debug/net8.0/CSDL2Mapping.dll",
+      "program": "${workspaceFolder}/tools/csdl-to-mapping/bin/Debug/net10.0/CSDL2Mapping.dll",
       "args": [
         "--csdl",
         "C:/Source/Repos/graph-workloads/Workloads/Microsoft.Intune.Updates/override/schema-Prod-beta.csdl"

src/Docs/Extensions/MarkdigExtensions.cs

@@ -59,8 +59,11 @@ public static List<string> GetColumnHeadings(this Table table)
 
         foreach (var headerCell in headerCells)
         {
-            var text = headerCell.Descendants<LiteralInline>().First();
-            headings.Add(text.TextValue());
+            var text = headerCell.Descendants<LiteralInline>().FirstOrDefault()?.TextValue();
+            if (!string.IsNullOrEmpty(text))
+            {
+                headings.Add(text);
+            }
         }
 
         return headings;