I know that for older versions of .NET, you can determine if a given version is installed by following
https://support.microsoft.com/en-us/kb/318785
It's possible that .NET Core is installed but not added to the
PATH
variable for your operating system or user profile. Running thedotnet
commands may not work. As an alternative, you can check that the .NET Core install folders exist.
It's installed to a standard folder if you didn't change it during the instillation
dotnet executable C:\program files\dotnet\dotnet.exe
.NET SDK C:\program files\dotnet\sdk\{version}\
.NET Runtime C:\program files\dotnet\shared\{runtime-type}\{version}\
For more details check How to check that .NET Core is already installed page at .NET documentation