Make addrepo.sh update package lists with apt-get instead of apt because it's faster since it doesn't build a dependency tree or read state information, especially on slow Raspberry Pis

Author: Aldaviva

RaspberryPiDotnetRepository/Debian/Repository/ExtraFileGenerator.cs

@@ -79,7 +79,7 @@ echo Adding repository
                                 echo "deb https://raspbian.aldaviva.com/ $(lsb_release -cs) main" | sudo tee /etc/apt/sources.list.d/aldaviva.list > /dev/null
 
                                 echo Finding available packages
-                                sudo apt update
+                                sudo apt-get update
 
                                 echo Ready to install .NET packages, for example:
                                 echo "  sudo apt install dotnet-runtime-latest"
@@ -94,4 +94,4 @@ sudo apt update
         return FILENAME;
     }
 
-}
+}