private async Task <Document> ChangetoAwaitAsync(Document document, InvocationExpressionSyntax invocation, string name, CancellationToken cancellationToken)
{
SyntaxNode oldExpression = invocation;
SyntaxNode newExpression = null;
if (!name.Contains("Async"))
{
var oldToken = invocation.DescendantTokens().First(z => z.Text == name);
var newToken = SyntaxFactory.Identifier(oldToken.LeadingTrivia, SyntaxKind.IdentifierToken, name + "Async", name + "Async", oldToken.TrailingTrivia);
var tempInvocation = invocation.ReplaceToken(oldToken, newToken);
newExpression = SyntaxFactory.AwaitExpression(tempInvocation).WithAdditionalAnnotations(Formatter.Annotation);
}
var oldroot = await document.GetSyntaxRootAsync(cancellationToken).ConfigureAwait(false);
var newroot = oldroot.ReplaceNode(oldExpression, newExpression);
var newDocument = document.WithSyntaxRoot(newroot);
return(newDocument);
}
