public static string GetCountOrLengthPropertyName(
ExpressionSyntax expression,
SemanticModel semanticModel,
CancellationToken cancellationToken = default(CancellationToken))
{
ITypeSymbol typeSymbol = semanticModel.GetTypeSymbol(expression, cancellationToken);
if (typeSymbol?.IsErrorType() == false &&
!typeSymbol.IsConstructedFromIEnumerableOfT())
{
if (typeSymbol.IsArrayType() ||
typeSymbol.IsString() ||
typeSymbol.IsConstructedFromImmutableArrayOfT(semanticModel))
{
return("Length");
}
if (SymbolUtility.ImplementsICollectionOfT(typeSymbol))
{
return("Count");
}
}
return(null);
}