This SDK requires the version of .NET Framework is newer than 3.5.
Firstly, you should choose the right version for your .NET Framework, for example, assuming the version of your .NET Framework is 4.5, then you should have QINGSTOR_SDK_NET45 installed.
$ git clone https://github.com/yunify/qingstor-sdk-net.git
Open the source code by Visual Studio 2013 or later.
You can download the DLL from here, and add it to your project. Because the SDK depends on Newtonsoft.Json.dll, you must install it for your version with:
Install-Package Newtonsoft.Json
You can either install the SDK by searching the right version in NuGet Package Manager, or with the below command line in the console:
Install-Package QingStor_SDK_NET45