C# 0 The Complete Reference

StringComparison

 is an enumeration that defines the values shown in Table 22-2. 

Using these values, it is possible to craft a comparison that meets the specific needs of your 

application. Thus, the addition of the 

StringComparison

 parameter expands the capabilities 

of

Compare( )

.

One particularly good use of the 

StringComparison

 form of 

Compare( )

 is to compare a 

string against an invariant file name or password. For example, imagine a situation in which 

the user must enter the password 

we~23&blx$

. This password is the same no matter what 

cultural settings are in effect. Thus, you want to compare the string entered by the user to 

the password without cultural differences affecting the comparison. One way to do this is 

Value

Description

CurrentCulture

Comparisons are per formed using the currently active 

cultural settings.

CurrentCultureIgnoreCase

Case-insensitive comparisons are per formed using the 

currently active cultural settings.

InvariantCulture

Comparisons are per formed using an invariant (that is, 

universal and unchanging) culture.

InvariantCultureIngoreCase

Case-insensitive comparisons are per formed using an 

invariant (that is, universal and unchanging) culture.

Ordinal

Comparisons are per formed using the ordinal values of the 

characters in the string. Thus, dictionar y-order may not result 

and cultural conventions are ignored.

OrdinalIgnoreCase

Case-insensitive comparisons are per formed using the ordinal 

values of the characters in the string. Thus, dictionar y-order 

may not result and cultural conventions are ignored.

T

ABLE

 22-2 

The

StringComparison

 Enumeration Values

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