Fix build warnings

Mostly fix anchors.

The one C# 9 spec was never intended to be published.

Author: BillWagner

docfx.json

@@ -77,7 +77,8 @@
                     "csharp-9.0/nullable-reference-types-specification.md",
                     "csharp-9.0/nullable-constructor-analysis.md",
                     "csharp-9.0/nullable-parameter-default-value-analysis.md",
-                    "csharp-9.0/skip-localsinit.md"
+                    "csharp-9.0/skip-localsinit.md",
+                    "csharp-9.0/variance-safety-for-static-interface-members.md"
                 ]
             },
             {

docs/csharp/misc/cs0612.md

@@ -12,7 +12,7 @@ ms.assetid: 7695f3b7-ffef-43f7-83db-fc1a9e361f1a
 
 'member' is obsolete  
 
- The class designer marked a member with the [Obsolete attribute](../language-reference/attributes/general.md#obsolete-attribute). This means that the member might not be supported in a future version of the class.  
+ The class designer marked a member with the [Obsolete attribute](../language-reference/attributes/general.md#obsolete-and-deprecated-attribute). This means that the member might not be supported in a future version of the class.  
 
  The following sample shows how accessing an obsolete member generates CS0612:  
 

docs/csharp/misc/cs0619.md

@@ -12,7 +12,7 @@ ms.assetid: a2060eb1-cda5-493c-b049-9b1792f88207
 
 'member' is obsolete: 'text'
 
-A class member was marked with the [Obsolete](../language-reference/attributes/general.md#obsolete-attribute) attribute, such that an error will be issued when the class member is referenced.
+A class member was marked with the [Obsolete](../language-reference/attributes/general.md#obsolete-and-deprecated-attribute) attribute, such that an error will be issued when the class member is referenced.
 
 ## Example
 

docs/csharp/versioning.md

@@ -46,7 +46,7 @@ Here are some things to consider when trying to maintain backwards compatibility
 will have to be updated. This is a huge breaking change and is strongly discouraged.
 - Method signatures: When updating a method behavior requires you to change its signature as well, you should instead create an overload so that code calling into that method will still work.
 You can always manipulate the old method signature to call into the new method signature so that implementation remains consistent.
-- [Obsolete attribute](language-reference/attributes/general.md#obsolete-attribute): You can use this attribute in your code to specify classes or class members that are deprecated and likely to be removed in future versions. This ensures developers utilizing your library are better prepared for breaking changes.
+- [Obsolete attribute](language-reference/attributes/general.md#obsolete-and-deprecated-attribute): You can use this attribute in your code to specify classes or class members that are deprecated and likely to be removed in future versions. This ensures developers utilizing your library are better prepared for breaking changes.
 - Optional Method Arguments: When you make previously optional method arguments compulsory or change their default value then all code that does not supply those arguments will need to be updated.
 
 > [!NOTE]

docs/csharp/whats-new/csharp-12.md

@@ -138,7 +138,7 @@ The difference is that the compiler can take advantage of known information abou
 
 ## Experimental attribute
 
-Types, methods, or assemblies can be marked with the <xref:System.Diagnostics.CodeAnalysis.ExperimentalAttribute?displayProperty=nameWithType> to indicate an experimental feature. The compiler issues a warning if you access a method or type annotated with the <xref:System.Diagnostics.CodeAnalysis.ExperimentalAttribute>. All types included in an assembly marked with the `Experimental` attribute are experimental. You can read more in the article on [General attributes read by the compiler](../language-reference/attributes/general.md#experimental-attribute), or the [feature specification](~/_csharplang/proposals/csharp-12.0/experimental-attribute.md).
+Types, methods, or assemblies can be marked with the <xref:System.Diagnostics.CodeAnalysis.ExperimentalAttribute?displayProperty=nameWithType> to indicate an experimental feature. The compiler issues a warning if you access a method or type annotated with the <xref:System.Diagnostics.CodeAnalysis.ExperimentalAttribute>. All types included in an assembly marked with the `Experimental` attribute are experimental. You can read more in the article on [General attributes read by the compiler](../language-reference/attributes/general.md#experimental-attributes), or the [feature specification](~/_csharplang/proposals/csharp-12.0/experimental-attribute.md).
 
 ## Interceptors
 

docs/fundamentals/networking/http/httpclient-guidelines.md

@@ -94,7 +94,7 @@ The preceding code:
 - Instantiates an `HttpClient` given the `resilienceHandler`.
 
 > [!IMPORTANT]
-> The `Microsoft.Extensions.Http.Resilience` library is currently marked as [experimental](../../../csharp/language-reference/attributes/general.md#experimental-attribute) and it may change in the future.
+> The `Microsoft.Extensions.Http.Resilience` library is currently marked as [experimental](../../../csharp/language-reference/attributes/general.md#experimental-attributes) and it may change in the future.
 
 ## See also