Fix the issue that UXMetadata generate null in example.parameters (#2…

…6505) (#26520)

Co-authored-by: Yunchi Wang <54880216+wyunchi-ms@users.noreply.github.com>

tools/StaticAnalysis/UXMetadataAnalyzer/UXMetadataAnalyzer.cs

@@ -178,6 +178,10 @@ private void ValidateMetadata(IssueLoggerContext context, string UXMetadataConte
 
         private void ValidateExample(IssueLoggerContext context, UXMetadataCommand command, CmdletMetadata cmdletMetadata, UXMetadataCommandExample example, ReportLogger<UXMetadataIssue> issueLogger)
         {
+            if (example.Parameters == null)
+            {
+                return;
+            }
             List<string> parameterListConvertedFromAlias = example.Parameters.Select(x =>
             {
                 string parameterNameInExample = x.Name.Trim('-');