env

• CentOS Linux release 7.9.2009 (Core)

Add M$ Repo

rpm -Uvh https://packages.microsoft.com/config/centos/7/packages-microsoft-prod.rpm

Install Dotnet

yum install dotnet-sdk-5.0 dotnet-sdk-3.1 -y 

After Installed

Using Command dotnet new globaljson Switch

When First Time Run, It Will Create global.json

Look Like These

{
  "sdk": {
    "version": "3.1.401"
  }
}

You Can Use This Command

dotnet --list-sdks
5.0.001 [/usr/share/dotnet/sdk]
3.1.404 [/usr/share/dotnet/sdk]

If You Want Switch To Other Version, Just Edit json File And Save It

{
  "sdk": {
    "version": "5.0.001"
  }
}

Change Finished