diff --git a/src/Compilers/VisualBasic/Portable/CommandLine/VisualBasicCommandLineParser.vb b/src/Compilers/VisualBasic/Portable/CommandLine/VisualBasicCommandLineParser.vb
index 59b417706a386..46dc932339063 100644
--- a/src/Compilers/VisualBasic/Portable/CommandLine/VisualBasicCommandLineParser.vb
+++ b/src/Compilers/VisualBasic/Portable/CommandLine/VisualBasicCommandLineParser.vb
@@ -100,7 +100,7 @@ Namespace Microsoft.CodeAnalysis.VisualBasic
             Dim parseDocumentationComments As Boolean = False ' Don't just null check documentationFileName because we want to do this even if the file name is invalid.
             Dim outputKind As OutputKind = OutputKind.ConsoleApplication
             Dim ssVersion As SubsystemVersion = SubsystemVersion.None
-            Dim languageVersion As LanguageVersion = LanguageVersion.VisualBasic14
+            Dim languageVersion As LanguageVersion = LanguageVersion.VisualBasic15
             Dim mainTypeName As String = Nothing
             Dim win32ManifestFile As String = Nothing
             Dim win32ResourceFile As String = Nothing
@@ -778,6 +778,8 @@ Namespace Microsoft.CodeAnalysis.VisualBasic
                                         languageVersion = LanguageVersion.VisualBasic12
                                     Case "14", "14.0"
                                         languageVersion = LanguageVersion.VisualBasic14
+                                    Case "15", "15.0"
+                                        languageVersion = LanguageVersion.VisualBasic15
                                     Case Else
                                         AddDiagnostic(diagnostics, ERRID.ERR_InvalidSwitchValue, "langversion", value)
                                 End Select
diff --git a/src/Compilers/VisualBasic/Portable/LanguageVersion.vb b/src/Compilers/VisualBasic/Portable/LanguageVersion.vb
index c6982b5b032b9..5372f8531b398 100644
--- a/src/Compilers/VisualBasic/Portable/LanguageVersion.vb
+++ b/src/Compilers/VisualBasic/Portable/LanguageVersion.vb
@@ -12,6 +12,7 @@ Namespace Microsoft.CodeAnalysis.VisualBasic
         VisualBasic11 = 11
         VisualBasic12 = 12
         VisualBasic14 = 14
+        VisualBasic15 = 15
     End Enum
 
     Friend Module LanguageVersionEnumBounds
@@ -23,7 +24,8 @@ Namespace Microsoft.CodeAnalysis.VisualBasic
                     LanguageVersion.VisualBasic10,
                     LanguageVersion.VisualBasic11,
                     LanguageVersion.VisualBasic12,
-                    LanguageVersion.VisualBasic14
+                    LanguageVersion.VisualBasic14,
+                    LanguageVersion.VisualBasic15
 
                     Return True
             End Select
@@ -45,6 +47,8 @@ Namespace Microsoft.CodeAnalysis.VisualBasic
                     Return "12.0"
                 Case LanguageVersion.VisualBasic14
                     Return "14.0"
+                Case LanguageVersion.VisualBasic15
+                    Return "15.0"
                 Case Else
                     Throw ExceptionUtilities.UnexpectedValue(value)
             End Select
diff --git a/src/Compilers/VisualBasic/Portable/PredefinedPreprocessorSymbols.vb b/src/Compilers/VisualBasic/Portable/PredefinedPreprocessorSymbols.vb
index 1db981fd9a6bd..b19ab2d94dad7 100644
--- a/src/Compilers/VisualBasic/Portable/PredefinedPreprocessorSymbols.vb
+++ b/src/Compilers/VisualBasic/Portable/PredefinedPreprocessorSymbols.vb
@@ -8,7 +8,7 @@ Imports Microsoft.CodeAnalysis.VisualBasic.Syntax
 Namespace Microsoft.CodeAnalysis.VisualBasic
     Public Module PredefinedPreprocessorSymbols
 
-        Friend Const CurrentVersionNumber = 14.0
+        Friend Const CurrentVersionNumber = 15.0
 
         ''' <summary>
         ''' Adds predefined preprocessor symbols VBC_VER and TARGET to given list of preprocessor symbols if not included yet.
diff --git a/src/Compilers/VisualBasic/Portable/PublicAPI.Unshipped.txt b/src/Compilers/VisualBasic/Portable/PublicAPI.Unshipped.txt
index e69de29bb2d1d..de98157963623 100644
--- a/src/Compilers/VisualBasic/Portable/PublicAPI.Unshipped.txt
+++ b/src/Compilers/VisualBasic/Portable/PublicAPI.Unshipped.txt
@@ -0,0 +1 @@
+Microsoft.CodeAnalysis.VisualBasic.LanguageVersion.VisualBasic15 = 15 -> Microsoft.CodeAnalysis.VisualBasic.LanguageVersion
\ No newline at end of file
diff --git a/src/Compilers/VisualBasic/Test/CommandLine/CommandLineTests.vb b/src/Compilers/VisualBasic/Test/CommandLine/CommandLineTests.vb
index eee060c811774..cba723663b24c 100644
--- a/src/Compilers/VisualBasic/Test/CommandLine/CommandLineTests.vb
+++ b/src/Compilers/VisualBasic/Test/CommandLine/CommandLineTests.vb
@@ -965,10 +965,18 @@ a.vb
             parsedArgs.Errors.Verify()
             Assert.Equal(LanguageVersion.VisualBasic14, parsedArgs.ParseOptions.LanguageVersion)
 
+            parsedArgs = DefaultParse({"/langVERSION:15", "a.vb"}, _baseDirectory)
+            parsedArgs.Errors.Verify()
+            Assert.Equal(LanguageVersion.VisualBasic15, parsedArgs.ParseOptions.LanguageVersion)
+
+            parsedArgs = DefaultParse({"/langVERSION:15.0", "a.vb"}, _baseDirectory)
+            parsedArgs.Errors.Verify()
+            Assert.Equal(LanguageVersion.VisualBasic15, parsedArgs.ParseOptions.LanguageVersion)
+
             ' default: "current version"
             parsedArgs = DefaultParse({"a.vb"}, _baseDirectory)
             parsedArgs.Errors.Verify()
-            Assert.Equal(LanguageVersion.VisualBasic14, parsedArgs.ParseOptions.LanguageVersion)
+            Assert.Equal(LanguageVersion.VisualBasic15, parsedArgs.ParseOptions.LanguageVersion)
 
             ' overriding
             parsedArgs = DefaultParse({"/langVERSION:10", "/langVERSION:9.0", "a.vb"}, _baseDirectory)
@@ -978,23 +986,23 @@ a.vb
             ' errors
             parsedArgs = DefaultParse({"/langVERSION", "a.vb"}, _baseDirectory)
             parsedArgs.Errors.Verify(Diagnostic(ERRID.ERR_ArgumentRequired).WithArguments("langversion", ":<number>"))
-            Assert.Equal(LanguageVersion.VisualBasic14, parsedArgs.ParseOptions.LanguageVersion)
+            Assert.Equal(LanguageVersion.VisualBasic15, parsedArgs.ParseOptions.LanguageVersion)
 
             parsedArgs = DefaultParse({"/langVERSION+", "a.vb"}, _baseDirectory)
             parsedArgs.Errors.Verify(Diagnostic(ERRID.WRN_BadSwitch).WithArguments("/langVERSION+")) ' TODO: Dev11 reports ERR_ArgumentRequired
-            Assert.Equal(LanguageVersion.VisualBasic14, parsedArgs.ParseOptions.LanguageVersion)
+            Assert.Equal(LanguageVersion.VisualBasic15, parsedArgs.ParseOptions.LanguageVersion)
 
             parsedArgs = DefaultParse({"/langVERSION:", "a.vb"}, _baseDirectory)
             parsedArgs.Errors.Verify(Diagnostic(ERRID.ERR_ArgumentRequired).WithArguments("langversion", ":<number>"))
-            Assert.Equal(LanguageVersion.VisualBasic14, parsedArgs.ParseOptions.LanguageVersion)
+            Assert.Equal(LanguageVersion.VisualBasic15, parsedArgs.ParseOptions.LanguageVersion)
 
             parsedArgs = DefaultParse({"/langVERSION:8", "a.vb"}, _baseDirectory)
             parsedArgs.Errors.Verify(Diagnostic(ERRID.ERR_InvalidSwitchValue).WithArguments("langversion", "8"))
-            Assert.Equal(LanguageVersion.VisualBasic14, parsedArgs.ParseOptions.LanguageVersion)
+            Assert.Equal(LanguageVersion.VisualBasic15, parsedArgs.ParseOptions.LanguageVersion)
 
             parsedArgs = DefaultParse({"/langVERSION:" & (LanguageVersion.VisualBasic12 + 1), "a.vb"}, _baseDirectory)
             parsedArgs.Errors.Verify(Diagnostic(ERRID.ERR_InvalidSwitchValue).WithArguments("langversion", CStr(LanguageVersion.VisualBasic12 + 1)))
-            Assert.Equal(LanguageVersion.VisualBasic14, parsedArgs.ParseOptions.LanguageVersion)
+            Assert.Equal(LanguageVersion.VisualBasic15, parsedArgs.ParseOptions.LanguageVersion)
         End Sub
 
         <Fact>