For consistency with VS, use lower-case GUIDs for project references.

dgrunwald · dgrunwald · commit 99c84e1f1062 · 2015-12-30T16:32:58.000+01:00
diff --git a/src/Main/Base/Project/Src/Project/Items/ProjectReferenceProjectItem.cs b/src/Main/Base/Project/Src/Project/Items/ProjectReferenceProjectItem.cs
@@ -55,7 +55,7 @@ public Guid ProjectGuid {
 					return Guid.Empty;
 			}
 			set {
-				SetEvaluatedMetadata("Project", value.ToString("B").ToUpperInvariant());
+				SetEvaluatedMetadata("Project", value.ToString("B"));
 			}
 		}
 		

Original file line number	Diff line number	Diff line change
`@@ -55,7 +55,7 @@ public Guid ProjectGuid {`
`55`	`55`	`return Guid.Empty;`
`56`	`56`	`}`
`57`	`57`	`set {`
`58`		`- SetEvaluatedMetadata("Project", value.ToString("B").ToUpperInvariant());`
	`58`	`+ SetEvaluatedMetadata("Project", value.ToString("B"));`
`59`	`59`	`}`
`60`	`60`	`}`
`61`	`61`