C#: Store output assembly in compilation_assembly relation

csharp/ql/src/semmle/code/csharp/Location.qll

@@ -14,6 +14,7 @@
 
 import File
 private import Attribute
+private import semmle.code.csharp.commons.Compilation
 
 /**
  * A location of a program element.
@@ -171,6 +172,9 @@ class Assembly extends Location, Attributable, @assembly {
   /** Gets the version of this assembly. */
   Version getVersion() { assemblies(this, _, _, _, result) }
 
+  /** Gets the compilation producing this assembly if any. */
+  Compilation getCompilation() { compilation_assembly(result, this) }
+
   override File getFile() { assemblies(this, result, _, _, _) }
 
   override string toString() { result = this.getFullName() }

csharp/ql/src/semmle/code/csharp/commons/Compilation.qll

@@ -9,6 +9,9 @@ class Compilation extends @compilation {
   /** Gets the directory in which this compilation was run, as a string. */
   string getDirectoryString() { compilations(this, result) }
 
+  /** Gets the output assembly. */
+  Assembly getOutputAssembly() { compilation_assembly(this, result) }
+
   /** Gets the folder in which this compilation was run. */
   Folder getFolder() { result.getAbsolutePath() = getDirectoryString() }
 

csharp/ql/src/semmlecode.csharp.dbscheme

@@ -151,6 +151,11 @@ compilation_finished(
     float elapsed_seconds : float ref
 );
 
+compilation_assembly(
+  unique int id : @compilation ref,
+  int assembly: @assembly ref
+)
+
 /*
  * External artifacts
  */