private static bool IsEventHandlerAssignLhs(CSharpSyntaxNode syntax)
{
var assignmentExpressionSyntax = syntax.GetAncestor <AssignmentExpressionSyntax>();
return(assignmentExpressionSyntax != null && assignmentExpressionSyntax.IsKind(CSSyntaxKind.AddAssignmentExpression, CSSyntaxKind.SubtractAssignmentExpression) &&
assignmentExpressionSyntax.Left.DescendantNodes().Contains(syntax));
}
