Create build.yml

.github/workflows/build.yml

@@ -0,0 +1,30 @@
+name: CI
+
+on:
+  push:
+    branches:
+    - master
+    - release/*
+  pull_request:
+    branches:
+    - master
+    - release/*
+
+jobs:
+
+  build:
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+    name: Build ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    steps:
+    - uses: actions/checkout@v1
+    - name: Setup .NET Core
+      uses: actions/setup-dotnet@v1
+      with:
+        dotnet-version: 5.0.100
+    - name: Build
+      run: dotnet build -c Release
+    - name: Test
+      run: dotnet test -c Release