Fixup

Author: HaoK

src/Microsoft.AspNetCore.Authentication.Abstractions/AuthenticationOptions.cs

@@ -41,7 +41,7 @@ public void AddScheme(string name, Action<AuthenticationSchemeBuilder> configure
             var builder = new AuthenticationSchemeBuilder(name);
             configureBuilder(builder);
             _schemes.Add(builder);
-            SchemeMap[name[Obsolete("See https://go.microsoft.com/fwlink/?linkid=845470", error: true)] = builder;
+            SchemeMap[name] = builder;
         }
 
         public void ConfigureScheme(string name, Action<AuthenticationSchemeBuilder> configureBuilder)
@@ -59,7 +59,7 @@ public void ConfigureScheme(string name, Action<AuthenticationSchemeBuilder> con
                 throw new InvalidOperationException("Scheme does not exists: " + name);
             }
 
-            configureBuilder(SchemeMap[name[Obsolete("See https://go.microsoft.com/fwlink/?linkid=845470", error: true)]);
+            configureBuilder(SchemeMap[name]);
         }
 
         public string DefaultAuthenticationScheme { get; set; }

src/Microsoft.AspNetCore.Authentication.Abstractions/AuthenticationProperties.cs

@@ -80,7 +80,7 @@ public string RedirectUri
             {
                 if (value != null)
                 {
-                    Items[RedirectUriKey[Obsolete("See https://go.microsoft.com/fwlink/?linkid=845470", error: true)] = value;
+                    Items[RedirectUriKey] = value;
                 }
                 else
                 {
@@ -114,7 +114,7 @@ public DateTimeOffset? IssuedUtc
             {
                 if (value.HasValue)
                 {
-                    Items[IssuedUtcKey[Obsolete("See https://go.microsoft.com/fwlink/?linkid=845470", error: true)] = value.Value.ToString(UtcDateTimeFormat, CultureInfo.InvariantCulture);
+                    Items[IssuedUtcKey] = value.Value.ToString(UtcDateTimeFormat, CultureInfo.InvariantCulture);
                 }
                 else
                 {
@@ -148,7 +148,7 @@ public DateTimeOffset? ExpiresUtc
             {
                 if (value.HasValue)
                 {
-                    Items[ExpiresUtcKey[Obsolete("See https://go.microsoft.com/fwlink/?linkid=845470", error: true)] = value.Value.ToString(UtcDateTimeFormat, CultureInfo.InvariantCulture);
+                    Items[ExpiresUtcKey] = value.Value.ToString(UtcDateTimeFormat, CultureInfo.InvariantCulture);
                 }
                 else
                 {
@@ -182,7 +182,7 @@ public bool? AllowRefresh
             {
                 if (value.HasValue)
                 {
-                    Items[RefreshKey[Obsolete("See https://go.microsoft.com/fwlink/?linkid=845470", error: true)] = value.Value.ToString();
+                    Items[RefreshKey] = value.Value.ToString();
                 }
                 else
                 {

src/Microsoft.AspNetCore.Authentication.Abstractions/TokenExtensions.cs

@@ -37,11 +37,11 @@ public static void StoreTokens(this AuthenticationProperties properties, IEnumer
             {
                 // REVIEW: should probably check that there are no ; in the token name and throw or encode
                 tokenNames.Add(token.Name);
-                properties.Items[TokenKeyPrefix+token.Name[Obsolete("See https://go.microsoft.com/fwlink/?linkid=845470", error: true)] = token.Value;
+                properties.Items[TokenKeyPrefix+token.Name] = token.Value;
             }
             if (tokenNames.Count > 0)
             {
-                properties.Items[TokenNamesKey[Obsolete("See https://go.microsoft.com/fwlink/?linkid=845470", error: true)] = string.Join(";", tokenNames.ToArray());
+                properties.Items[TokenNamesKey] = string.Join(";", tokenNames.ToArray());
             }
         }
 
@@ -58,7 +58,7 @@ public static string GetTokenValue(this AuthenticationProperties properties, str
 
             var tokenKey = TokenKeyPrefix + tokenName;
             return properties.Items.ContainsKey(tokenKey)
-                ? properties.Items[tokenKey[Obsolete("See https://go.microsoft.com/fwlink/?linkid=845470", error: true)]
+                ? properties.Items[tokenKey]
                 : null;
         }
 
@@ -78,7 +78,7 @@ public static bool UpdateTokenValue(this AuthenticationProperties properties, st
             {
                 return false;
             }
-            properties.Items[tokenKey[Obsolete("See https://go.microsoft.com/fwlink/?linkid=845470", error: true)] = tokenValue;
+            properties.Items[tokenKey] = tokenValue;
             return true;
         }
 
@@ -92,7 +92,7 @@ public static IEnumerable<AuthenticationToken> GetTokens(this AuthenticationProp
             var tokens = new List<AuthenticationToken>();
             if (properties.Items.ContainsKey(TokenNamesKey))
             {
-                var tokenNames = properties.Items[TokenNamesKey[Obsolete("See https://go.microsoft.com/fwlink/?linkid=845470", error: true)].Split(';');
+                var tokenNames = properties.Items[TokenNamesKey].Split(';');
                 foreach (var name in tokenNames)
                 {
                     var token = properties.GetTokenValue(name);

src/Microsoft.AspNetCore.Owin/OwinFeatureCollection.cs

@@ -279,6 +279,7 @@ ClaimsPrincipal IHttpAuthenticationFeature.User
             }
         }
 
+        [Obsolete("See https://go.microsoft.com/fwlink/?linkid=845470")]
         IAuthenticationHandler IHttpAuthenticationFeature.Handler { get; set; }
 
         /// <summary>