Install dotnet core on Linux Mint 19

Microsoft has its own package source for ubuntu now. The official download page has detailed instructions: https://dotnet.microsoft.com/download/linux-package-manager/ubuntu19-04/sdk-current

The following deb package installs the package source in your system:

wget -q https://packages.microsoft.com/config/ubuntu/19.04/packages-microsoft-prod.deb -O packages-microsoft-prod.deb
sudo dpkg -i packages-microsoft-prod.deb

After an sudo apt-get update you can simply install your favorite SDK (e.g. 3.0) via

sudo apt-get install dotnet-sdk-3.0

The major benefit: you get updates and its easier to upgrade to the next major release.

you may grab the package from here and install manually:

http://security.ubuntu.com/ubuntu/pool/main/i/icu/

Did you also try this way?

Download from : https://www.microsoft.com/net/download

Then:

mkdir -p $HOME/dotnet

cd Downloads

tar zxf dotnet-sdk-2.0.3-linux-x64.tar.gz -C $HOME/dotnet

export PATH=$PATH:$HOME/dotnet

Verify your installation:

dotnet --version