Update authorization docs for C-sharp developers

book.json

@@ -22,6 +22,10 @@
                 {
                     "lang": "rust",
                     "name": "Rust"
+                },
+                {
+                    "lang": "cs",
+                    "name": "C#"
                 }
             ]
         }

book/overview/oauth/authorization-code-grant.md

@@ -93,6 +93,49 @@ return json_decode($response->getBody())->access_token;
 
 This will return a JSON response containing the JWT `access_token`.
 {% endtab %}
+
+{% tab title="C#" %}
+```cs
+using Flurl;
+using Flurl.Http;
+
+namespace YourApplication
+{
+    class AuthorizationResult
+    {
+        public string token_type { get; set; }
+        public int expires_in { get; set; }
+        public string access_token { get; set; }
+        public string refresh_token { get; set; }
+    }
+
+    class Program
+    {
+        private static string Url = "https://anilist.co/api/v2/oauth/token";
+
+        public static async Task<string> GetBearerToken()
+        {
+            var result = await Url
+                .PostJsonAsync(new
+                {
+                    grant_type = "authorization_code",
+                    client_id = "{client_id}",
+                    client_secret = "{client_secret}",
+                    redirect_uri = "{redirect_uri}",
+                    code = "{code}"
+                })
+                .ReceiveJson<AuthorizationResult>();
+
+            return result.access_token;
+        }
+    }
+}
+
+```
+
+This will return a JSON response containing the JWT `access_token`.
+{% endtab %}
+
 {% endtabs %}
 
 ## Making Authenticated Requests

book/overview/oauth/implicit-grant.md

@@ -80,5 +80,25 @@ $response = $http->request('POST', 'https://graphql.anilist.co', [
 ]);
 ```
 {% endtab %}
+
+{% tab title="C#" %}
+```cs
+using Flurl;
+using Flurl.Http;
+
+public static async Task<string> GetQueryResult()
+{
+    var result = await "https://graphql.anilist.co"
+        .WithOAuthBearerToken({YOUR BEARER TOKEN HERE})
+        .PostJsonAsync(new
+        {
+            query = "{YOUR QUERY STRING HERE}"
+        })
+        .ReceiveString(); // For demo purposes, I will use ReceiveString method. But you should use ReceiveJson method to access the data
+
+    return result;
+}
+```
+{% endtab %}
 {% endtabs %}