Merge pull request #2 from Shiroechi/readme

Update README.md

README.md

@@ -1,2 +1,56 @@
 # OpenTriviaSharp
- API wrapper for opentdb.com
+
+API wrapper for opentdb.com
+
+[![CodeFactor](https://www.codefactor.io/repository/github/shiroechi/opentriviasharp/badge?style=for-the-badge)](https://www.codefactor.io/repository/github/shiroechi/opentriviasharp)
+
+# Download 
+
+![Nuget](https://img.shields.io/nuget/v/OpenTriviaSharp?style=for-the-badge)
+
+# Feature
+- Get randon questions
+- Session token to prevent duplicate question
+
+# Example
+
+## Basic Usage
+
+```C#
+var client = new OpenTriviaClient();
+var questions = await client.GetQuestionAsync(
+    amount: 2, // number of question to retrieve ( 1 .. 50)
+    type: TriviaType.Multiple, // question type (multiple choice or boolean)
+    difficulty: Difficulty.Hard, // difficulty of the question (easy/medium/hard)
+    category: Category.General); // category of the question
+```
+
+## Using session token
+
+```C#
+// create Open triva client 
+var client = new OpenTriviaClient();
+
+// request the token
+var token = await client.client.RequestTokenAsync();
+
+var questions = await client.GetQuestionAsync(
+    amount: 2, // number of question to retrieve ( 1 .. 50)
+    type: TriviaType.Multiple, // question type (multiple choice or boolean)
+    difficulty: Difficulty.Hard, // difficulty of the question (easy/medium/hard)
+    category: Category.General, // category of the question
+    sessionToken: token);  // prevent duplicate question
+```
+
+Every requested `token` only available for 6 hours, after that you must reset the  `token`. If all question already retrieved with the `token`, you must reset it again or it will throw exception.
+
+## Reset token
+
+```C#
+var client = new OpenTriviaClient();
+
+var token = await client.client.RequestTokenAsync();
+
+await client.ResetTokenAsync(token);
+```
+