.NET Core SDK overview
.NET Core Software Development Kit (SDK) is a set of libraries and tools that allow developers to create .NET Core applications and libraries. It contains the following components that are used to build and run applications:
- The .NET Core CLI tools.
- .NET Core libraries and runtime.
Acquiring the .NET Core SDK
As with any tooling, the first thing is to get the tools to your machine. Depending on your scenario, you can install the SDK using one of the following methods:
- Use the native installers.
- Use the installation shell script.
The native installers are primarily meant for developer's machines. The SDK is distributed using each supported platform's native install mechanism, such as DEB packages on Ubuntu or MSI bundles on Windows. These installers install and set up the environment as needed for the user to use the SDK immediately after the install. However, they also require administrative privileges on the machine. You can find the SDK to install on the .NET downloads page.
Install scripts, on the other hand, don't require administrative privileges. However, they also don't install any prerequisites on the machine; you need to install all of the prerequisites manually. The scripts are meant mostly for setting up build servers or when you wish to install the tools without admin privileges (do note the prerequisites caveat above). You can find more information in the install script reference article. If you're interested in how to set up the SDK on your CI build server, see the Using .NET Core SDK and tools in Continuous Integration (CI) article.
By default, the SDK installs in a "side-by-side" (SxS) manner, which means multiple versions of the CLI tools can coexist at any given time on a single machine. How the version gets picked when you're running CLI commands is explained in more detail in the Select the .NET Core version to use article.