Add unit-tests. (#43604)

Closes #24517

src/Compilers/CSharp/Test/Emit/CodeGen/CodeGenTupleTest.cs

@@ -27087,5 +27087,32 @@ .locals init (C.<>c__DisplayClass0_0 V_0, //CS$<>8__locals0
     }
 ");
         }
+
+        [Fact]
+        [WorkItem(24517, "https://github.com/dotnet/roslyn/issues/24517")]
+        public void Issue24517()
+        {
+            var source = @"
+using System;
+using System.Collections.Generic;
+using System.Linq.Expressions;
+class C
+{
+    static void Main()
+    {
+        Expression<Func<ValueTuple<int, int>>> e1 = () => new ValueTuple<int, int>(1, 2);
+        Expression<Func<KeyValuePair<int, int>>> e2 = () => new KeyValuePair<int, int>(1, 2);
+
+        e1.Compile()();
+        e2.Compile()();
+
+        Console.WriteLine(""Done."");
+    }
+}";
+            var comp = CreateCompilation(
+                source,
+                options: TestOptions.ReleaseExe);
+            CompileAndVerify(comp, expectedOutput: @"Done.");
+        }
     }
 }

src/Compilers/VisualBasic/Test/Emit/CodeGen/CodeGenTuples.vb

@@ -23084,6 +23084,33 @@ Module Module1
         System.Console.WriteLine(""Done"")
     End Sub
 
+End Module
+"
+
+            Dim comp1 = CreateCompilation(source0, options:=TestOptions.DebugExe)
+            CompileAndVerify(comp1, expectedOutput:="Done")
+        End Sub
+
+        <Fact>
+        <WorkItem(24517, "https://github.com/dotnet/roslyn/issues/24517")>
+        Public Sub Issue24517()
+            Dim source0 = "
+Imports System
+Imports System.Collections.Generic
+Imports System.Linq.Expressions
+
+Module Module1
+
+    Sub Main()
+        Dim e1 As Expression(Of Func(Of ValueTuple(Of Integer, Integer))) = Function() new ValueTuple(Of Integer, Integer)(1, 2)
+        Dim e2 As Expression(Of Func(Of KeyValuePair(Of Integer, Integer))) = Function() new KeyValuePair(Of Integer, Integer)(1, 2)
+
+        e1.Compile()()
+        e2.Compile()()
+
+        System.Console.WriteLine(""Done"")
+    End Sub
+
 End Module
 "