Add project to project graph

src/dotnet/commands/dotnet-build/CompilerIO.cs

@@ -0,0 +1,16 @@
+using System.Collections.Generic;
+
+namespace Microsoft.DotNet.Tools.Build
+{
+    public struct CompilerIO
+    {
+        public readonly List<string> Inputs;
+        public readonly List<string> Outputs;
+
+        public CompilerIO(List<string> inputs, List<string> outputs)
+        {
+            Inputs = inputs;
+            Outputs = outputs;
+        }
+    }
+}