Address @bergmeister's feedback

Author: Robert Holt

PSCompatibilityCollector/Microsoft.PowerShell.CrossCompatibility/Query/Modules/ModuleData.cs

@@ -81,7 +81,7 @@ private IReadOnlyDictionary<string, IReadOnlyList<CommandData>> CreateAliasTable
                 return null;
             }
 
-            var aliasTable = new Dictionary<string, IReadOnlyList<CommandData>>();
+            var aliasTable = new Dictionary<string, IReadOnlyList<CommandData>>(StringComparer.OrdinalIgnoreCase);
             foreach (KeyValuePair<string, string> alias in aliases)
             {
                 if (_parent.Aliases.TryGetValue(alias.Key, out IReadOnlyList<CommandData> aliasedCommands))

PSCompatibilityCollector/Microsoft.PowerShell.CrossCompatibility/Query/RuntimeData.cs

@@ -36,7 +36,7 @@ public RuntimeData(Data.RuntimeData runtimeData)
             _modules = new Lazy<IReadOnlyDictionary<string, IReadOnlyDictionary<Version, ModuleData>>>(() => CreateModuleTable(runtimeData.Modules));
             _nonAliasCommands = new Lazy<IReadOnlyDictionary<string, IReadOnlyList<CommandData>>>(() => CreateNonAliasCommandLookupTable(Modules));
             _aliases = new Lazy<IReadOnlyDictionary<string, IReadOnlyList<CommandData>>>(() => CreateAliasLookupTable(runtimeData.Modules, NonAliasCommands));
-            _commands = new Lazy<IReadOnlyDictionary<string, IReadOnlyList<CommandData>>>(() => new DualLookupTable<string, IReadOnlyList<CommandData>>(Aliases, NonAliasCommands));
+            _commands = new Lazy<IReadOnlyDictionary<string, IReadOnlyList<CommandData>>>(() => new DualLookupTable<string, IReadOnlyList<CommandData>>(NonAliasCommands, Aliases));
             _nativeCommands = new Lazy<NativeCommandLookupTable>(() => NativeCommandLookupTable.Create(runtimeData.NativeCommands));
         }