public static async Task <Document> RefactorAsync(
Document document,
PropertyDeclarationSyntax property,
CancellationToken cancellationToken)
{
var parentMember = (MemberDeclarationSyntax)property.Parent;
SemanticModel semanticModel = await document.GetSemanticModelAsync(cancellationToken).ConfigureAwait(false);
ISymbol fieldSymbol = GetFieldSymbol(property, semanticModel, cancellationToken);
var declarator = (VariableDeclaratorSyntax)await fieldSymbol.DeclaringSyntaxReferences[0].GetSyntaxAsync(cancellationToken).ConfigureAwait(false);
var variableDeclaration = (VariableDeclarationSyntax)declarator.Parent;
SyntaxList <MemberDeclarationSyntax> members = parentMember.GetMembers();
int propertyIndex = members.IndexOf(property);
int fieldIndex = members.IndexOf((FieldDeclarationSyntax)variableDeclaration.Parent);
ImmutableArray <SyntaxNode> oldNodes = await document.FindSymbolNodesAsync(fieldSymbol, cancellationToken).ConfigureAwait(false);
IdentifierNameSyntax newNode = IdentifierName(property.Identifier);
MemberDeclarationSyntax newParentMember = parentMember.ReplaceNodes(oldNodes, (f, g) => newNode.WithTriviaFrom(f));
members = newParentMember.GetMembers();
if (variableDeclaration.Variables.Count == 1)
{
newParentMember = newParentMember.RemoveNode(
newParentMember.GetMemberAt(fieldIndex),
SyntaxRemoveOptions.KeepUnbalancedDirectives);
if (propertyIndex > fieldIndex)
{
propertyIndex--;
}
}
else
{
var field = (FieldDeclarationSyntax)members[fieldIndex];
FieldDeclarationSyntax newField = field.RemoveNode(
field.Declaration.Variables[variableDeclaration.Variables.IndexOf(declarator)],
SyntaxRemoveOptions.KeepUnbalancedDirectives);
members = members.Replace(field, newField.WithFormatterAnnotation());
newParentMember = newParentMember.SetMembers(members);
}
members = newParentMember.GetMembers();
property = (PropertyDeclarationSyntax)members[propertyIndex];
PropertyDeclarationSyntax newProperty = CreateAutoProperty(property, declarator.Initializer);
members = members.Replace(property, newProperty);
newParentMember = newParentMember.SetMembers(members);
return(await document.ReplaceNodeAsync(parentMember, newParentMember, cancellationToken).ConfigureAwait(false));
}