C# | Char.GetUnicodeCategory(String, Int32) Method with Examples

This method is used to categorizes the character at the specified position in a specified string into a group identified by one of the UnicodeCategory values. 

Syntax:

public static System.Globalization.UnicodeCategory GetUnicodeCategory (string s, int index);

Parameters:

• s: It is the String.
• index: It is the character position in s.

Return Value: This method returns a UnicodeCategory enumerated constant that identifies the group that contains the character at position index in s. 

Exceptions:

• ArgumentNullException: If the s is null.
• ArgumentOutOfRangeException: If the index is less than zero or greater than the last position in s.

Below programs illustrate the use of Char.GetUnicodeCategory(String, Int32) Method: 

Example 1: 

the letter present at index 3 is DecimalDigitNumber 
the letter present at index 0 is UppercaseLetter 
the letter present at index 2 is LowercaseLetter

Example 2: For ArgumentNullException 

the letter present at index 3 is DecimalDigitNumber 
the letter present at index 0 is UppercaseLetter 
the letter present at index 2 is LowercaseLetter 

s is null
Exception Thrown: System.ArgumentNullException

Example 3: For ArgumentOutOfRangeException 

the letter present at index 3 is DecimalDigitNumber 
the letter present at index 0 is UppercaseLetter 
the letter present at index 2 is LowercaseLetter 

index is less than zero
Exception Thrown: System.ArgumentOutOfRangeException

Reference:

• https://learn.microsoft.com/en-us/dotnet/api/system.char.getunicodecategory?view=netframework-4.7.2#System_Char_GetUnicodeCategory_System_String_System_Int32_