public async Task ComputeRefactoringAsync(RefactoringContext context, StatementListSelection selectedStatements)
{
SingleLocalDeclarationStatementInfo localInfo = SyntaxInfo.SingleLocalDeclarationStatementInfo(selectedStatements.FirstOrDefault() as LocalDeclarationStatementSyntax);
if (!localInfo.Success)
{
return;
}
ExpressionSyntax value = localInfo.Value;
if (value == null)
{
return;
}
if (value.Kind() == SyntaxKind.DefaultExpression)
{
return;
}
if (value is LiteralExpressionSyntax)
{
return;
}
SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);
var typeSymbol = semanticModel.GetTypeSymbol(localInfo.Type, context.CancellationToken) as INamedTypeSymbol;
if (typeSymbol?.Implements(SpecialType.System_IDisposable, allInterfaces: true) != true)
{
return;
}
context.RegisterRefactoring(
$"Using '{localInfo.IdentifierText}'",
cancellationToken => RefactorAsync(context.Document, selectedStatements, cancellationToken));
}