From 73a23433da6d7e4533b979fad5173b1ea629261a Mon Sep 17 00:00:00 2001
From: Ashley Hauck <ashauck@microsoft.com>
Date: Tue, 11 Jul 2017 13:52:44 -0700
Subject: [PATCH] Provide a message with invalid HostObjects

Re-using an already-present error message:
MSB3087: An incompatible host object was passed into the "{0}" task.  The host object for this task must implement the "{1}" interface.
---
 src/Compilers/Core/MSBuildTask/Csc.cs | 2 +-
 src/Compilers/Core/MSBuildTask/Vbc.cs | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/Compilers/Core/MSBuildTask/Csc.cs b/src/Compilers/Core/MSBuildTask/Csc.cs
index e37dde21826..2f54ead5f77 100644
--- a/src/Compilers/Core/MSBuildTask/Csc.cs
+++ b/src/Compilers/Core/MSBuildTask/Csc.cs
@@ -208,7 +208,7 @@ protected internal override void AddResponseFileCommands(CommandLineBuilderExten
             }
             else if (HostObject != null)
             {
-                throw new InvalidOperationException();
+                throw new InvalidOperationException(string.Format(ErrorString.General_IncorrectHostObject, "Csc", "ICscHostObject"));
             }
             if (!designTime)
             {
diff --git a/src/Compilers/Core/MSBuildTask/Vbc.cs b/src/Compilers/Core/MSBuildTask/Vbc.cs
index f4ec6c95d0a..391cf444198 100644
--- a/src/Compilers/Core/MSBuildTask/Vbc.cs
+++ b/src/Compilers/Core/MSBuildTask/Vbc.cs
@@ -512,7 +512,7 @@ protected internal override void AddResponseFileCommands(CommandLineBuilderExten
             }
             else if (this.HostObject != null)
             {
-                throw new InvalidOperationException();
+                throw new InvalidOperationException(string.Format(ErrorString.General_IncorrectHostObject, "Vbc", "IVbcHostObject"));
             }
             if (!designTime)
             {
-- 
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