Update .travis.yml

.travis.yml

@@ -25,12 +25,12 @@ addons:
 # Make sure build dependencies are installed.
 before_install:  
   - if test "$TRAVIS_OS_NAME" == "osx"; then ln -s /usr/local/opt/openssl/lib/libcrypto.1.0.0.dylib /usr/local/lib/; ln -s /usr/local/opt/openssl/lib/libssl.1.0.0.dylib /usr/local/lib/; fi
-  - curl https://packages.microsoft.com/keys/microsoft.asc | gpg --dearmor > microsoft.gpg
-  - sudo mv microsoft.gpg /etc/apt/trusted.gpg.d/microsoft.gpg
-  - sudo sh -c 'echo "deb [arch=amd64] https://packages.microsoft.com/repos/microsoft-ubuntu-trusty-prod trusty main" > /etc/apt/sources.list.d/dotnetdev.list'
-  - sudo apt-get update
-  - sudo apt-get install -y dotnet-sdk-2.0.0 dotnet-sharedframework-microsoft.netcore.app-1.1.2
+  - export DOTNET_INSTALL_DIR="$PWD/.dotnetcli"
+  - export PATH="$DOTNET_INSTALL_DIR:$PATH"  
   
+install:
+  - travis_retry curl -sSL https://dot.net/v1/dotnet-install.sh | bash /dev/stdin --channel 2.0 --version "$CLI_VERSION" --install-dir "$DOTNET_INSTALL_DIR"
+
 # Run the build script
 script:
   - dotnet --info