What really solved in my case:

sudo ln -s /usr/local/share/dotnet/x64/dotnet /usr/local/bin/

after this command, go to ~/.zshrc

nano ~/.zshrc

And add followings:

• export DOTNET_ROOT=$HOME/.dotnet
• export PATH=$PATH:$DOTNET_ROOT:$DOTNET_ROOT/tools

Keys to save and exit editor: Ctrl+x, Y, Enter

After that, it will definitely work.