private static SyntaxNode CreateRootAddingDisposeToEndOfMethod(SyntaxNode root, ExpressionStatementSyntax statement, ILocalSymbol identitySymbol)
{
var method = statement.FirstAncestorOrSelf <MethodDeclarationSyntax>();
var newDispose = ImplementsDisposableExplicitly(identitySymbol.Type)
? SyntaxFactory.ExpressionStatement(SyntaxFactory.InvocationExpression(
SyntaxFactory.MemberAccessExpression(SyntaxKind.SimpleMemberAccessExpression,
SyntaxFactory.ParenthesizedExpression(SyntaxFactory.CastExpression(SyntaxFactory.ParseName("System.IDisposable").WithAdditionalAnnotations(Simplifier.Annotation), SyntaxFactory.IdentifierName(identitySymbol.Name))),
SyntaxFactory.IdentifierName("Dispose"))))
: SyntaxFactory.ParseStatement($"{identitySymbol.Name}.Dispose();");
newDispose = newDispose.WithAdditionalAnnotations(Formatter.Annotation);
var last = method.Body.Statements.Last();
var newRoot = root.InsertNodesAfter(method.Body.Statements.Last(), new[] { newDispose });
return(newRoot);
}