Numeric types use a separate bitwise negation operator in C#

Author: GrahamTheCoder

CodeConverter/CSharp/ExpressionNodeVisitor.cs

@@ -659,6 +659,12 @@ public override async Task<CSharpSyntaxNode> VisitUnaryExpression(VBasic.Syntax.
             if (kind == SyntaxKind.LogicalNotExpression && await NegateAndSimplifyOrNullAsync(node, expr) is { } simpleNegation) {
                 return AsBool(node, simpleNegation);
             }
+
+            if (kind == SyntaxKind.LogicalNotExpression &&
+                _semanticModel.GetTypeInfo(node.Operand).ConvertedType is {} t &&
+                (t.IsNumericType() || t.IsEnumType())) {
+                csTokenKind = SyntaxKind.TildeToken;
+            }
             return SyntaxFactory.PrefixUnaryExpression(
                 kind,
                 SyntaxFactory.Token(csTokenKind),

Tests/TestData/SelfVerifyingTests/VBToCS/EnumTests.vb

@@ -67,4 +67,13 @@ Public Class EnumTests
         Dim s As String = RankEnum.Second
         Assert.Equal(s & RankEnum.Second, "22")
     End Sub
+
+    <Fact>
+    Public Sub NegatedEnumNegatesUnderlyingNumber()
+        Dim initialEnum = RankEnum.First Or RankEnum.Second
+        Dim withSecondRemoved = initialEnum And Not RankEnum.Second
+        Dim i As RankEnum = (1 Or 2) And Not 2
+        Assert.Equal(withSecondRemoved, i)
+        Assert.Equal(withSecondRemoved, RankEnum.First)
+    End Sub
 End Class