Rider doesn't see NetCore 3.0 - linux

Question

I had used VS CODE before. But now I would like to try JetBrains Rider. Currently, I have only NetCore 3.0. But before I had 2.2. I had removed old NetCore and installed new one. I am trying to create new project. But Rider don't see NetCore 3.0.
I did not see ability to change NetCore SDK. My operation system is Linux Mint 18. I have only one NetCore version. And it's 3.0.
Why it's happening?

Answer 1

It is pretty common problem. I have solved it by specifying path to .Net Sdk manually. This is the screen of settings:
Specify path to .NET binary file. It is usually has the following path /home/<your_user>/dotnet/dotnet
Specify path to MSBuild file. For example my path is the next : /home/aleksej/dotnet/sdk/3.0.100-preview6-012264/MSBuild.dll
Save
Profit!
P.S. My operation system is Linux Mint 19.1. And version of .Net Core is not important in this case.
Update
I forgot about one important moment. If you need to change .NET version for your solution, you have to place special global.json file in the root of your solution. If you are changing .NET version for a project - put global.json on the project root path.
Example of global.json for changing .NET version:
{
"sdk": {
"version": "2.2.300"
}
}

Answer 2

If you want to find the location of your sdk then write the following command: dotnet --list-sdks. It has to show you 3.1.403 [/usr/share/dotnet/sdk] or similar to it. If it's not then consider it installed using the following guide Install .NET Core on Linux . Then select the dotnet file in .NET CORE CLI executable path, with it's respective MSBuild.dll .
PD: Remember to save the changes globally!!!.

Answer 3

what solved for me was remove the .idea folder and start again.

Answer 4

I have to use the Jetbrain MSE build
I have to do some set of things to work, due to the windows security I have some issue
On windows 11 do this
launch powershell as an admin
Set-ExecutionPolicy Unrestricted
Get-AppXPackage -AllUsers | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"}
Set-ExecutionPolicy restricted
IGNORE THE ERRORS
on windows 10 do this
launch powershell as an admin}
run get-AppxPackage Microsoft.SecHealthUI -AllUsers | Reset-AppxPackage
if it doesn't work do this
run Add-AppxPackage -Register -DisableDevelopmentMode "C:\Windows\SystemApps\Microsoft.Windows.SecHealthUI_cw5n1h2txyewy\AppXManifest.xml"
run get-AppxPackage Microsoft.SecHealthUI -AllUsers | Reset-AppxPackage
Then follow the instruction from here
https://rider-support.jetbrains.com/hc/en-us/articles/360006365380