latest .net + vscode + c# dev kit中存在已知问题。github发出提示以证明.net sdk的设置。
在ubuntu上安装.net 8有多种方法。给予这个试试（已知使用ubuntu编译.net 8程序集）：

# drops old dependencies and repos
sudo snap remove dotnet-sdk
sudo apt remove 'dotnet*'
sudo apt remove 'aspnetcore*'
sudo apt remove 'netstandard*'
sudo apt autoremove -y
sudo rm /etc/apt/sources.list.d/microsoft-prod.list
sudo rm /etc/apt/sources.list.d/microsoft-prod.list.save

# Get Ubuntu version
declare repo_version=$(if command -v lsb_release &> /dev/null; then lsb_release -r -s; else grep -oP '(?<=^VERSION_ID=).+' /etc/os-release | tr -d '"'; fi)

# Download Microsoft signing key and repository
wget https://packages.microsoft.com/config/ubuntu/$repo_version/packages-microsoft-prod.deb -O packages-microsoft-prod.deb

# Install Microsoft signing key and repository
sudo dpkg -i packages-microsoft-prod.deb

# Clean up
rm packages-microsoft-prod.deb

# Update packages
sudo apt update 

# get .net 8
sudo apt-get install -y dotnet-sdk-8.0

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