diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0ee5888d..cdc96218 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,17 @@
+### 7.0.0
+- Deprecate `ConfigCatClient` constructors in favor of the new static factory method `Get`,
+  which provides single client instances per SDK key.
+- Add convenience method `DisposeAll` for disposing all open clients at once.
+- Implement default user feature.
+- Implement offline mode feature.
+- Improve LazyLoad and AutoPoll refresh logic by taking the cache timestamp into account
+  to fetch the config only if cached config is unavailable or stale.
+- Add new evaluation methods `GetValueDetail`/`GetValueDetails`,
+  which provide more detailed information about the evaluation result.
+- Add hooks (events), which provide notifications of the client's actions.  
+- Additional minor code quality and performance improvements.
+- Update samples to .NET 6.
+
 ### 6.5.3
 - Use logger wrapper everywhere internally. #39
 - Improved evaluation logging. #38
@@ -116,7 +130,12 @@
 - Addressing global data handling and processing trends via Data Governance feature. Customers can control the geographic location where their config JSONs get published to. [See the docs](https://configcat.com/docs/advanced/data-governance/).
 We are introducing a new DataGovernance initialization parameter. Set this parameter to be in sync with the Data Governance preference on the [Dashboard](https://app.configcat.com/organization/data-governance).
        
-#### Breaking change:
+#### Breaking changes:
+### 7.0.0
+- [API] Add new methods to the `IConfigCatClient` interface.
+- [API] Change `ProjectConfig` to reference type with value equality (record).
+- [Behavior] Slightly changes the behavior of ProjectConfig.TimeStamp (only updated when communication with the CDN servers succeeds, regardless of the returned status code.)
+### 6.0.0
 - Custom cache implementations should implement the new cache interface using key parameter in the get/set methods.
 ### 5.3.0
 - VariationID, bugfix ([#11](https://github.com/configcat/.net-sdk/issues/11))
diff --git a/README.md b/README.md
index 5806d47b..7ce85b4f 100644
--- a/README.md
+++ b/README.md
@@ -1,10 +1,9 @@
 # ConfigCat SDK for .NET
 
-### Supported frameworks:
-- .NET Core
-- .NET Framework
-- Xamarin
-- .NET Standard
+### Supported runtimes:
+- .NET 5+
+- .NET Framework 4.5+
+- Other runtimes which implement .NET Standard 2.0+ like .NET Core 2.0+, Xamarin.Android 8.0+, Xamarin.iOS 10.14+, etc. (For more details, please refer to [this table](https://learn.microsoft.com/en-us/dotnet/standard/net-standard?tabs=net-standard-2-0).)
 
 https://configcat.com
 
@@ -41,10 +40,12 @@ using ConfigCat.Client;
 
 ### 4. Create a **ConfigCat** client instance:
 ```c#
-var client = new ConfigCatClient("#YOUR-SDK-KEY#");
+var client = ConfigCatClient.Get("#YOUR-SDK-KEY#");
 ```
 
 > We strongly recommend using the *ConfigCat Client* as a Singleton object in your application.
+> You can acquire singleton client instances for your SDK keys using the `ConfigCatClient.Get(sdkKey: <sdkKey>)` static factory method.
+(However, please keep in mind that subsequent calls to `ConfigCatClient.Get()` with the *same SDK Key* return a *shared* client instance, which was set up by the first call.)
 
 ### 5. Get your setting value:
 ```c#
@@ -64,7 +65,8 @@ else
 ``` c#
 client.Dispose();
 ```
-> To ensure graceful shutdown of the client you should invoke ```.Dispose()``` method. (Client implements [IDisposable](https://msdn.microsoft.com/en-us/library/system.idisposable(v=vs.110).aspx) interface)
+> To ensure graceful shutdown of the client you should invoke ```.Dispose()``` method. (Client implements [IDisposable](https://msdn.microsoft.com/en-us/library/system.idisposable(v=vs.110).aspx) interface.)
+> Alternatively, you can also close all open clients at once using the `ConfigCatClient.DisposeAll()` method.
 
 ## Getting user specific setting values with Targeting
 Using this feature, you will be able to get different setting values for different users in your application by passing a `User Object` to the `GetValue()` function.
diff --git a/appveyor.yml b/appveyor.yml
index a410e7c7..d0d8d68e 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,5 +1,5 @@
 environment:
-  build_version: 6.5.3
+  build_version: 7.0.0
 version: $(build_version)-{build}
 image: Visual Studio 2022
 configuration: Release