Is .Contains case-sensitive in .Net? [duplicate]

Question

Is the string-method .Contains case-sensitive in .Net?

For example:

string str1 = "tEst";
string str2 = "Te"; 

Boolean bool = str1.Contains(str2);

in the time it took to write this question - couldn't you just have fixed the obvious error and tried it? or looked up The Manual, saying This method performs an ordinal (case-sensitive and culture-insensitive) comparison.? — Franz Gleichmann
– Franz Gleichmann, Commented Apr 27, 2022 at 11:52
According to the docs for that method - "This method performs an ordinal (case-sensitive and culture-insensitive) comparison." — stuartd
– stuartd, Commented Apr 27, 2022 at 11:54
FYI, if you use it in a EF Linq query then it will be translated to SQL and the case sensitivity will be determined by the DB which usually defaults to case insensitive. — juharr
– juharr, Commented Apr 27, 2022 at 12:16

Papai from BEKOAIL · Accepted Answer · 2022-04-27 11:58:38Z

0

From Microsoft's official documentation:

Remarks This method performs an ordinal (case-sensitive and culture-insensitive) comparison.

read it for more..

answered Apr 27, 2022 at 11:58

Papai from BEKOAIL

1,5391 gold badge13 silver badges18 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

JonasH · Accepted Answer · 2022-04-27 12:06:29Z

0

Yes. By default, string comparisons are always case sensitive in the framework. The recommended way is to get case insensitivity is to use a StringComparison or a stringComparer to specify case insensitivity.

Versions of .Net older than .Net core 2.1 lack a .Contains overload that takes such an argument. A workaround is to use .IndexOf and check that it returns a index >= 0, since that can take a StringComparison argument.

edited Apr 27, 2022 at 12:06

answered Apr 27, 2022 at 12:00

JonasH

38.4k2 gold badges15 silver badges31 bronze badges

Collectives™ on Stack Overflow

Is .Contains case-sensitive in .Net? [duplicate]

2 Answers 2

Comments

Comments

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Linked

Related