Update CS0110 (#39749)

docs/csharp/misc/cs0110.md

@@ -1,42 +1,43 @@
 ---
 description: "Compiler Error CS0110"
 title: "Compiler Error CS0110"
-ms.date: 07/20/2015
-f1_keywords: 
+ms.date: 02/29/2024
+f1_keywords:
   - "CS0110"
-helpviewer_keywords: 
+helpviewer_keywords:
   - "CS0110"
 ms.assetid: 0bfe7071-1194-4142-a1a1-6190ee92b1d4
 ---
 # Compiler Error CS0110
 
-The evaluation of the constant value for 'const declaration' involves a circular definition  
-
- The declaration of a [const](../language-reference/keywords/const.md) variable (`a`) cannot reference another const variable (`b`) that also references (`a`).  
-
- The following sample generates CS0110:  
-
-```csharp  
-// CS0110.cs  
-namespace MyNamespace  
-{  
-   public class A  
-   {  
-      public static void Main()  
-      {  
-      }  
-   }  
-
-   public class B : A  
-   {  
-      public const int i = c + 1;   // CS0110, c already references i  
-      public const int c = i + 1;  
-      // the following line would be OK  
-      // public const int c = 10;  
-   }  
-}  
-```  
-
+The evaluation of the constant value for 'const declaration' involves a circular definition
+
+ The declaration of a [const](../language-reference/keywords/const.md) variable cannot reference another const variable such that a circular dependency is formed. This also applies to associated constant values of enum members.
+
+## Example
+
+ The associated constant value of `MyClass.Color.Red` is explicitly set to `MyClass.Color.Blue`, but the value of `MyClass.Color.Blue` is dependent on the previous enum member (`MyClass.Color.Red`), hence both constant values cannot be determined. Similarly, the constant variable `MyClass.a` is defined in terms of `MyClass.b`, but that is also defined in terms of `MyClass.a`.
+
+ The following sample generates CS0110:
+
+```csharp
+// CS0110.cs
+// compile with: /target:library
+class MyClass
+{
+    enum Color
+    {
+        Red = Blue,   // CS0110
+        Blue,
+    }
+
+    public const int a = b + 1;   // CS0110
+    public const int b = a + 1;
+}
+```
+
+To resolve this error, break the circular reference by modifying or removing the definition.
+
 ## See also
 
 - [Constants](../programming-guide/classes-and-structs/constants.md)