In this article we will see that how can use and execute the SQL Commands in Visual Studio. In this article we are using C# language. As we proceed in this article you will see that what steps are required to perform this task. We need the two main classes to do this. These classes are SqlConnection and SqlCommand. Â First we will use to include the namespaces that are required to using these two classes. First we will include two namespaces by using ‘using’ keyword. After importing this namespaces we will create the object for SqlConnection and SqlCommand.