diff --git a/src/EditorFeatures/CSharpTest/InlineDeclaration/CSharpInlineDeclarationTests.cs b/src/EditorFeatures/CSharpTest/InlineDeclaration/CSharpInlineDeclarationTests.cs
index 1ed0149d70a6ae73de0d0a5d472d1774a0edee68..62a339b514e877dcbe585ed8c34ec172c04b2565 100644
--- a/src/EditorFeatures/CSharpTest/InlineDeclaration/CSharpInlineDeclarationTests.cs
+++ b/src/EditorFeatures/CSharpTest/InlineDeclaration/CSharpInlineDeclarationTests.cs
@@ -1610,5 +1610,25 @@ void Foo()
     }
 }", ignoreTrivia: false);
         }
+
+        [Fact, Trait(Traits.Feature, Traits.Features.CodeActionsInlineDeclaration)]
+        public async Task TestMissingOnUnderscore()
+        {
+            await TestMissingInRegularAndScriptAsync(
+@"
+using System;
+
+class C
+{
+    void M()
+    {
+        [|int|] _;
+        if (N(out _)
+        {
+            Console.WriteLine(_);
+        }
+    }
+}");
+        }
     }
 }
\ No newline at end of file
diff --git a/src/Features/CSharp/Portable/InlineDeclaration/CSharpInlineDeclarationDiagnosticAnalyzer.cs b/src/Features/CSharp/Portable/InlineDeclaration/CSharpInlineDeclarationDiagnosticAnalyzer.cs
index a7467a84a29d2d135d7dc6e156c5d26f8c6b5202..0b336c4b18ced8089886a21fca3310164e55940f 100644
--- a/src/Features/CSharp/Portable/InlineDeclaration/CSharpInlineDeclarationDiagnosticAnalyzer.cs
+++ b/src/Features/CSharp/Portable/InlineDeclaration/CSharpInlineDeclarationDiagnosticAnalyzer.cs
@@ -113,6 +113,13 @@ private void AnalyzeSyntaxNode(SyntaxNodeAnalysisContext context, INamedTypeSymb
 
             var identifierName = (IdentifierNameSyntax)argumentExpression;
 
+            // Don't offer to inline variables named "_".  It can cause is to create a discard symbol
+            // which would cause a break.
+            if (identifierName.Identifier.ValueText == "_")
+            {
+                return;
+            }
+
             var containingStatement = argumentExpression.FirstAncestorOrSelf<StatementSyntax>();
             if (containingStatement == null)
             {