don't discard result of GetUniqueVariableNameInScope

Author: Timur Kelman

CodeConverter/CSharp/MethodBodyExecutableStatementVisitor.cs

@@ -786,15 +786,15 @@ public override async Task<SyntaxList<StatementSyntax>> VisitSelectBlock(VBSynta
                     labels.Add(SyntaxFactory.DefaultSwitchLabel());
                 } else if (c is VBSyntax.RelationalCaseClauseSyntax relational) {
 
-                    var varName = CommonConversions.CsEscapedIdentifier(GetUniqueVariableNameInScope(node, "case"));
-                    ExpressionSyntax csLeft = ValidSyntaxFactory.IdentifierName(varName);
                     var operatorKind = VBasic.VisualBasicExtensions.Kind(relational);
                     var csRelationalValue = await relational.Value.AcceptAsync<ExpressionSyntax>(_expressionVisitor);
                     CasePatternSwitchLabelSyntax caseSwitchLabelSyntax;
                     if (isObjectComparison) {
                         caseSwitchLabelSyntax = WrapInCasePatternSwitchLabelSyntax(node, relational.Value, csRelationalValue, false, operatorKind);
                     }
                     else {
+                        var varName = CommonConversions.CsEscapedIdentifier(GetUniqueVariableNameInScope(node, "case"));
+                        ExpressionSyntax csLeft = ValidSyntaxFactory.IdentifierName(varName);
                         csRelationalValue = CommonConversions.TypeConversionAnalyzer.AddExplicitConversion(relational.Value, csRelationalValue);
                         var binaryExp = SyntaxFactory.BinaryExpression(operatorKind.ConvertToken(), csLeft, csRelationalValue);
                         caseSwitchLabelSyntax = VarWhen(varName, binaryExp);

Tests/CSharp/ExpressionTests/ExpressionTests.cs

@@ -2344,7 +2344,7 @@ public void S()
                     j = 3;
                     break;
                 }
-            case var case4 when Operators.ConditionalCompareObjectGreater(case4, 4, false):
+            case var case3 when Operators.ConditionalCompareObjectGreater(case3, 4, false):
                 {
                     j = 4;
                     break;