Improve CS0119 error documentation with specific guidance for Type collections (#47308)

* Initial plan

* Add specific example for CS0119 error with List<Type> collections

Co-authored-by: BillWagner <[email protected]>

---------

Co-authored-by: copilot-swe-agent[bot] <[email protected]>
Co-authored-by: BillWagner <[email protected]>

Author: Copilot

docs/csharp/misc/cs0119.md

@@ -20,7 +20,9 @@ ms.assetid: 048924f1-378f-4021-bd20-299d3218f810
 
 - A method identifier is used as if it were a struct or class  
 
-## Example  
+## Examples  
+
+### Example 1
 
  The following sample generates CS0119: 'C.B()' is a method, which is not valid in the given context. You can fix this error by changing the name of the method `C.B`, or using the fully qualified name for the class `B` like `N2.B`.
 
@@ -42,3 +44,70 @@ namespace N1
     }
 }
 ```
+
+### Example 2
+
+The following sample shows a common scenario where CS0119 occurs when trying to add class names to a collection of types. The compiler expects <xref:System.Type> instances, not class names.
+
+```csharp
+using System;
+using System.Collections.Generic;
+
+public class Page_BaseClass { }
+public class Page_CRTable { }
+public class Page_DBGridWithTools { }
+
+public static class PageTypeManager
+{
+    public static List<Type> GetPageTypes()
+    {
+        List<Type> pageTypesList = new List<Type>();
+        
+        // CS0119: 'Page_BaseClass' is a type, which is not valid in the given context
+        pageTypesList.Add(Page_BaseClass);
+        pageTypesList.Add(Page_CRTable);
+        pageTypesList.Add(Page_DBGridWithTools);
+        
+        return pageTypesList;
+    }
+}
+```
+
+To fix this error, use the <xref:System.Type.GetType%2A?displayProperty=nameWithType> method or the `typeof` operator to get `Type` instances:
+
+```csharp
+using System;
+using System.Collections.Generic;
+
+public static class PageTypeManager
+{
+    public static List<Type> GetPageTypes()
+    {
+        List<Type> pageTypesList = new List<Type>();
+        
+        // Use typeof operator to get Type instances
+        pageTypesList.Add(typeof(Page_BaseClass));
+        pageTypesList.Add(typeof(Page_CRTable));
+        pageTypesList.Add(typeof(Page_DBGridWithTools));
+        
+        return pageTypesList;
+    }
+    
+    // Alternative: Load types dynamically by name
+    public static List<Type> GetPageTypesByName(string[] typeNames)
+    {
+        List<Type> pageTypesList = new List<Type>();
+        
+        foreach (string typeName in typeNames)
+        {
+            Type type = Type.GetType(typeName);
+            if (type != null)
+            {
+                pageTypesList.Add(type);
+            }
+        }
+        
+        return pageTypesList;
+    }
+}
+```