diff --git a/README.md b/README.md
index 51ee764..abb9c4f 100644
--- a/README.md
+++ b/README.md
@@ -137,6 +137,106 @@ m2.OnMessage = (conv, msg) => {
 
 更多关于**对话**用法：[参考](https://github.com/leancloud/csharp-sdk/blob/master/Realtime/Realtime.Test/Message.cs)
 
+## 排行榜
+
+### 创建排行榜
+
+```csharp
+LCLeaderboard leaderboard = await LCLeaderboard.CreateLeaderboard(leaderboardName);
+```
+
+### 更新成绩
+
+```csharp
+await LCLeaderboard.UpdateStatistics(user, new Dictionary<string, double> {
+    { leaderboardName, 100 }
+});
+```
+
+### 获取成绩
+
+```csharp
+LCUser user = await LCUser.Login(username, password);
+ReadOnlyCollection<LCStatistic> statistics = await LCLeaderboard.GetStatistics(user);
+foreach (LCStatistic statistic in statistics) {
+    WriteLine($"{statistic.Name} : {statistic.Value}");
+}
+```
+
+### 获取我附近的成绩
+
+```csharp
+await LCUser.Login(username, password);
+LCLeaderboard leaderboard = LCLeaderboard.CreateWithoutData(leaderboardName);
+ReadOnlyCollection<LCRanking> rankings = await leaderboard.GetResultsAroundUser(limit: 5);
+foreach (LCRanking ranking in rankings) {
+    WriteLine($"{ranking.Rank} : {ranking.User.ObjectId}, {ranking.Value}");
+}
+```
+
+### 获取榜单
+
+```csharp
+LCLeaderboard leaderboard = LCLeaderboard.CreateWithoutData(leaderboardName);
+ReadOnlyCollection<LCRanking> rankings = await leaderboard.GetResults();
+foreach (LCRanking ranking in rankings) {
+    WriteLine($"{ranking.Rank} : {ranking.User.ObjectId}, {ranking.Value}");
+}
+```
+
+## LiveQuery
+
+### 订阅
+
+```csharp
+LCQuery<LCObject> query = new LCQuery<LCObject>("Account");
+query.WhereGreaterThan("balance", 100);
+liveQuery = await query.Subscribe();
+```
+
+### 事件
+
+```csharp
+// 新建符合条件对象的事件
+liveQuery.OnCreate = (obj) => {
+    WriteLine($"create: {obj}");
+};
+
+// 符合条件对象更新事件
+liveQuery.OnUpdate = (obj, updatedKeys) => {
+    WriteLine($"update: {obj}");
+};
+
+// 符合条件对象被删除事件
+liveQuery.OnDelete = (objId) => {
+    WriteLine($"delete: {objId}");
+};
+
+// 有新的符合条件的对象事件
+liveQuery.OnEnter = (obj, updatedKeys) => {
+    WriteLine($"enter: {obj}");
+};
+
+// 有符合条件的对象不再满足条件事件
+liveQuery.OnLeave = (obj, updatedKeys) => {
+    WriteLine($"level: {obj}");
+};
+```
+
+### 特殊事件
+
+当一个用户成功登录应用，OnLogin 事件会被触发。下面的 user 就是登录的 LCUser:
+
+```csharp
+await LCUser.Login("hello", "world");
+LCQuery<LCUser> userQuery = LCUser.GetQuery();
+userQuery.WhereEqualTo("username", "hello");
+LCLiveQuery userLiveQuery = await userQuery.Subscribe();
+userLiveQuery.OnLogin = (user) => {
+    WriteLine($"login: {user}");
+};
+```
+
 ## 文档
 
 [API 文档](https://leancloud.github.io/csharp-sdk/html/index.html)
diff --git a/csharp-sdk.sln b/csharp-sdk.sln
index 205f883..ac80be7 100644
--- a/csharp-sdk.sln
+++ b/csharp-sdk.sln
@@ -29,13 +29,13 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "RealtimeApp", "Sample\Realt
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "LiveQuery", "LiveQuery", "{A1A24E0F-6901-4A9A-9BB8-4F586BC7EE17}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "LiveQuery", "LiveQuery\LiveQuery\LiveQuery.csproj", "{659BA438-1DA7-4A32-92A4-DD0FAE142259}"
+Project("{9344BDBB-3E7F-41FC-A0DD-8665D75EE146}") = "LiveQueryApp", "Sample\LiveQueryApp\LiveQueryApp.csproj", "{FBB9B634-672E-4C13-8D30-AAC6429BB3CA}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "LiveQuery.Test", "LiveQuery\LiveQuery.Test\LiveQuery.Test.csproj", "{7F770CE0-593E-486A-96E8-8903BC27C6FB}"
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "LiveQuery", "LiveQuery\LiveQuery\LiveQuery.csproj", "{02D23AC7-FBF7-49ED-994F-C1D0D3C3ABFE}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "LiveQueryApp", "Sample\LiveQueryApp\LiveQueryApp.csproj", "{CF72C053-5DB9-4E9C-BF9D-6664672F4916}"
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "LiveQuery.Test", "LiveQuery\LiveQuery.Test\LiveQuery.Test.csproj", "{0F61B6D7-4948-4D98-B6CC-41CF33B55669}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "LiveQuery-Unity", "LiveQuery\LiveQuery-Unity\LiveQuery-Unity.csproj", "{FF11B077-93F1-45FD-A3C7-020D316EB5A4}"
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "LiveQuery-Unity", "LiveQuery\LiveQuery-Unity\LiveQuery-Unity.csproj", "{12482E48-C0CF-46B1-8FDD-5885D1B7DC4D}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -79,22 +79,22 @@ Global
 		{A716EFC7-9220-4A9A-9F73-B816A0787F77}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{A716EFC7-9220-4A9A-9F73-B816A0787F77}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{A716EFC7-9220-4A9A-9F73-B816A0787F77}.Release|Any CPU.Build.0 = Release|Any CPU
-		{659BA438-1DA7-4A32-92A4-DD0FAE142259}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{659BA438-1DA7-4A32-92A4-DD0FAE142259}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{659BA438-1DA7-4A32-92A4-DD0FAE142259}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{659BA438-1DA7-4A32-92A4-DD0FAE142259}.Release|Any CPU.Build.0 = Release|Any CPU
-		{7F770CE0-593E-486A-96E8-8903BC27C6FB}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{7F770CE0-593E-486A-96E8-8903BC27C6FB}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{7F770CE0-593E-486A-96E8-8903BC27C6FB}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{7F770CE0-593E-486A-96E8-8903BC27C6FB}.Release|Any CPU.Build.0 = Release|Any CPU
-		{CF72C053-5DB9-4E9C-BF9D-6664672F4916}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{CF72C053-5DB9-4E9C-BF9D-6664672F4916}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{CF72C053-5DB9-4E9C-BF9D-6664672F4916}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{CF72C053-5DB9-4E9C-BF9D-6664672F4916}.Release|Any CPU.Build.0 = Release|Any CPU
-		{FF11B077-93F1-45FD-A3C7-020D316EB5A4}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{FF11B077-93F1-45FD-A3C7-020D316EB5A4}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{FF11B077-93F1-45FD-A3C7-020D316EB5A4}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{FF11B077-93F1-45FD-A3C7-020D316EB5A4}.Release|Any CPU.Build.0 = Release|Any CPU
+		{FBB9B634-672E-4C13-8D30-AAC6429BB3CA}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{FBB9B634-672E-4C13-8D30-AAC6429BB3CA}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{FBB9B634-672E-4C13-8D30-AAC6429BB3CA}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{FBB9B634-672E-4C13-8D30-AAC6429BB3CA}.Release|Any CPU.Build.0 = Release|Any CPU
+		{02D23AC7-FBF7-49ED-994F-C1D0D3C3ABFE}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{02D23AC7-FBF7-49ED-994F-C1D0D3C3ABFE}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{02D23AC7-FBF7-49ED-994F-C1D0D3C3ABFE}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{02D23AC7-FBF7-49ED-994F-C1D0D3C3ABFE}.Release|Any CPU.Build.0 = Release|Any CPU
+		{0F61B6D7-4948-4D98-B6CC-41CF33B55669}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{0F61B6D7-4948-4D98-B6CC-41CF33B55669}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{0F61B6D7-4948-4D98-B6CC-41CF33B55669}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{0F61B6D7-4948-4D98-B6CC-41CF33B55669}.Release|Any CPU.Build.0 = Release|Any CPU
+		{12482E48-C0CF-46B1-8FDD-5885D1B7DC4D}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{12482E48-C0CF-46B1-8FDD-5885D1B7DC4D}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{12482E48-C0CF-46B1-8FDD-5885D1B7DC4D}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{12482E48-C0CF-46B1-8FDD-5885D1B7DC4D}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(NestedProjects) = preSolution
 		{26CDAE2A-6D79-4981-8D80-3EA34FDFB134} = {319A9989-3B69-4AD0-9E43-F6D31C1D2A4A}
@@ -106,10 +106,10 @@ Global
 		{882A9419-CC5E-4CFB-B076-7561989B0A4A} = {319A9989-3B69-4AD0-9E43-F6D31C1D2A4A}
 		{75A3A4EC-93B8-40C9-AE04-DF14A72525CC} = {319A9989-3B69-4AD0-9E43-F6D31C1D2A4A}
 		{A716EFC7-9220-4A9A-9F73-B816A0787F77} = {2D980281-F060-4363-AB7A-D4B6C30ADDBB}
-		{659BA438-1DA7-4A32-92A4-DD0FAE142259} = {A1A24E0F-6901-4A9A-9BB8-4F586BC7EE17}
-		{7F770CE0-593E-486A-96E8-8903BC27C6FB} = {A1A24E0F-6901-4A9A-9BB8-4F586BC7EE17}
-		{CF72C053-5DB9-4E9C-BF9D-6664672F4916} = {2D980281-F060-4363-AB7A-D4B6C30ADDBB}
-		{FF11B077-93F1-45FD-A3C7-020D316EB5A4} = {A1A24E0F-6901-4A9A-9BB8-4F586BC7EE17}
+		{FBB9B634-672E-4C13-8D30-AAC6429BB3CA} = {2D980281-F060-4363-AB7A-D4B6C30ADDBB}
+		{02D23AC7-FBF7-49ED-994F-C1D0D3C3ABFE} = {A1A24E0F-6901-4A9A-9BB8-4F586BC7EE17}
+		{0F61B6D7-4948-4D98-B6CC-41CF33B55669} = {A1A24E0F-6901-4A9A-9BB8-4F586BC7EE17}
+		{12482E48-C0CF-46B1-8FDD-5885D1B7DC4D} = {A1A24E0F-6901-4A9A-9BB8-4F586BC7EE17}
 	EndGlobalSection
 	GlobalSection(MonoDevelopProperties) = preSolution
 		version = 0.1.0