## Understanding Hexadecimal and Binary:

Before diving into the conversion process, let's briefly review hexadecimal and binary systems. In hexadecimal, the symbols range from 0 to 9, and then from A to F, representing values from 0 to 15. Binary, on the other hand, consists of only 0s and 1s, representing powers of 2.

## Converting Hexadecimal to Binary in C#:

To convert a hexadecimal number to binary in C#, we can use built-in functions to handle the conversion. The `Convert.ToInt32()`

method is particularly useful for this task. Here's a simple program demonstrating the conversion:

```
using System;
class Program
{
static void Main(string[] args)
{
string hexNumber = "1A7"; // Hexadecimal number
string binaryNumber = Convert.ToString(Convert.ToInt32(hexNumber, 16), 2); // Convert hexadecimal to binary
Console.WriteLine("Hexadecimal: " + hexNumber);
Console.WriteLine("Binary: " + binaryNumber);
}
}
```

### Output:

```
Hexadecimal: 1A7
Binary: 110100111
```

In the program above, we first declare a hexadecimal number `1A7`

. We then use `Convert.ToInt32()`

to convert the hexadecimal string to its decimal equivalent, using base 16 as the input format specifier. Finally, we convert the decimal number to binary using `Convert.ToString()`

with base 2 as the output format specifier.

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