Constant Variables in C#

`const` Variables:

• A `const` variable is a read-only variable whose value cannot be changed once it is assigned.
• It is declared using the `const` keyword.
• `const` variables must be initialized at the time of declaration.

Here's an example:

const int MAX_VALUE = 100;

In this example, `MAX_VALUE` is a `const` variable with a value of 100. Its value cannot be modified throughout the program.