Can Contains be use case insensitive

Question

I would like to make a filter, that is searching case in sensitive

items.Add("apple");
items.Add("apple banana ");
items.Add("Apple Banana Lemon");

Using this list

I am searching for "b", I would like to get 2 lines returned.

Since contains is case sensitive, I only get 1 line.

How to solve this ?

https://code.sololearn.com/cJh0D4vMZwzw/?ref=app

Answer 1

Yes,exists
i => i.Contains("b",StringComparison.OrdinalIgnoreCase)

Also You can try :
i => i.ToLower().Contains("b")

Answer 2

Thank you. the first one, did it.

The second one should work as wel, but is less elegant.

Answer 3

I think, by search, visual Studio only supports .Net framework.
Not the .Net Core. It's avialable in core.

"On .NET Core 2.1 and later versions: Call the Contains(String, StringComparison) overload instead."

https://learn.microsoft.com/en-us/dotnet/api/system.string.contains?view=net-7.0

so Use any alternatives like IndexOf method

https://stackoverflow.com/questions/444798/case-insensitive-containsstring

Answer 4

Unfortunately. On sololearn this works but in my visual studio i get the following error.

CS1501 C# No overload for method 'Contains' takes 2 arguments

Why do i get this error ?

Answer 5

Thanks.

Visual studio does support .Net Core, but the project am working in uses .Net Framework.

Indexof works fine.

Thank you for the explanation.