dotnet-5-ubuntu20.04.md

dotnet 5 on ubuntu 20.04

until it will supported through deb to make it work snap install could used, but I needed to have 3.1 and 5.0 sdks without to switch beetween, so follow is my approach:

• download
  • netcore3.1 sdks binaries
  • netcore5.0 sdks binaries (preview)
  • libicu63 for netcore5.0 preview
• create an /opt/netcore and unpack there netcore-3.1 then netcore-5.0
• install libicu63 sudo dpkg -i libicu63_63.2-2_amd64.deb
• setup ~/.bashrc so that

export DOTNET_ROOT=/opt/dotnet
# use without localization ( only invariant ) until release of 5.0
export DOTNET_SYSTEM_GLOBALIZATION_INVARIANT=true
export PATH=$PATH:$DOTNET_ROOT

• test with

dotnet new console -n test
cd test
dotnet build
dotnet run

• sdks available

devel0@tuf:~$ dotnet --list-sdks
3.1.202 [/opt/dotnet/sdk]
5.0.100-preview.3.20216.6 [/opt/dotnet/sdk]

• to enable vscode omnisharp to work correctly I needed to apply follow omnisharp.json file in the solution or alternatively globally placing into ~/.omnisharp/omnisharp.json

{
    "MsBuild": {
        "UseLegacySdkResolver": true
    }
}

• optional: in the solution folder initialize global json and change in case ( see dotnet --list-sdks for specific names )

dotnet new globaljson

test it opening previous test solution then set a breakpoint and hit F5