Visual Studio's community edition is something entirely different from IntelliJ's community edition. IntelliJ is open source[1] but Visual Studio is proprietary with tricky license terms[2] that limit it to companies of a certain size, among other things.

[1] https://github.com/JetBrains/intellij-community

[2] https://visualstudio.microsoft.com/license-terms/mlt031819/