Line sensitivity

Question

Possible duplicate:
Is C # register invalid equal to operator?

string string1 = "aBc"

string string2 = "AbC"

how to check if string1 matches string2 and return true, regardless of case sensitivity.

Answer 1

Two approaches:

You can .ToLower()either do string equality, or you can use this:

string.Equals(string1, string2, StringComparison.CurrentCultureIgnoreCase)

: downvoters, , (.. , ). , ( , , .NET Unicode), :

string.Equals(string1, string2, StringComparison.OrdinalIgnoreCase)

Answer 2

MSDN: " " :

• : StringComparison.Ordinal OrdinalIgnoreCase .
• DO: StringComparison.Ordinal OrdinalIgnoreCase .
• DO: StringComparison.CurrentCulture .
• DO: StringComparison.Ordinal StringComparison.OrdinalIgnoreCase, (, ).
• DO: ToUpperInvariant, ToLowerInvariant.
• : , .
• : StringComparison.InvariantCulture; , - .

, . .

Answer 3

You can also use string.Compare by adding a third parameter, which is ignoreCase:

if (string.Compare(string1, string2, true) == 0) 
{ 
   // string are equal
}

And you can also use the CompareInfo class:

if (CultureInfo.CurrentCulture.CompareInfo.Compare(string1, string2, 
    CompareOptions.IgnoreCase) == 0)
{
   // string are equal
}

Answer 4

string.Equals(string1, string2, StringComparison.CurrentCultureIgnoreCase);

: D

Answer 5

string.Equals("aBc", "AbC", StringComparison.CurrentCultureIgnoreCase)