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C# | Uri.IsHexDigit() Method

Last Updated : 11 Jul, 2025
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Uri.IsHexDigit(Char) Method is used to determine whether a specified character is a valid hexadecimal digit or not. Hexadecimal digits are the digits 0 to 9 and the letters A-F or a-f.
Syntax: public static bool IsHexDigit (char character); Here, it takes the character to validate. Return Value: This method returns true if the character is a valid hexadecimal digit otherwise, false.
Below programs illustrate the use of Uri.IsHexDigit(Char) Method: Example 1: csharp
// C# program to demonstrate the
// Uri.IsHexDigit(Char) Method
using System;
using System.Globalization;

class GFG {

    // Main Method
    public static void Main()
    {
        // Declaring and initializing address1
        char ch = 'a';

        // Validating the Character
        // using IsHexDigit(Char) method
        bool value = Uri.IsHexDigit(ch);

        // Displaying the result
        if (value)
            Console.WriteLine("{0} is a valid Hexadecimal Digit", ch);
        else
            Console.WriteLine("{0} is a not valid Hexadecimal Digit", ch);
    }
}
Output:
a is a valid Hexadecimal Digit
Example 2: csharp
// C# program to demonstrate the
// Uri.IsHexDigit(Char) Method
using System;
using System.Globalization;

class GFG {

    // Main Method
    public static void Main()
    {

        // calling get() method
        get('a');
        get('.');
        get('1');
    }

    // defining get() method
    public static void get(char ch)
    {

        // Validating the Character
        // using IsHexDigit(Char) method
        bool value = Uri.IsHexDigit(ch);

        // Displaying the result
        if (value)
            Console.WriteLine("{0} is a valid Hexadecimal Digit", ch);
        else
            Console.WriteLine("{0} is a not valid Hexadecimal Digit", ch);
    }
}
Output:
a is a valid Hexadecimal Digit
. is a not valid Hexadecimal Digit
1 is a valid Hexadecimal Digit
Reference:

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