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Ternary operator in a while loop in C#

I'm very new to programming and I was wondering how could I break out the loop if the number is valid with a ternary operator? I'm used to do it with if-else but in this case I don't know the proper syntax to do it or if it is possible.
Thanks!
while (!valid)
{
.....
Console.Write("Enter your phone number : ");
string noTelephone = Console.ReadLine();
string message = ValiderTelephone(noTelephone) ? "Numéro valide" : "Numéro invalide";
}

I'd go the way that Magnetron indicated in the comments if you're desperate for something that uses a ternary, but realistically there isn't any point in arranging the code lol you have/setting the message if you're going to loop until it's valid, because you don't use the message you set! This means that by the time the code reaches a point where message could be used for something, it must surely be "Number valid"
How about:
Console.WriteLine("Enter number:");
string num = Console.ReadLine();
while(!ValidNumber(num)){
Console.WriteLine("Invalid number, try again:");
num = Console.ReadLine();
}
string message = "Number valid";
Or better:
private string Ask(string question){
Console.WriteLine(question);
return Console.ReadLine();
}
...
string num = Ask("Enter number:");
while(!ValidNumber(num))
num = Ask("Invalid number, try again:");

How to print Text and value from integer on the same line in the console?

This is what I do, but it didn't work:
int money;
Console.Writeline("Enter how much money you want";
money=int.Parse(Console.ReadLine());
Console.Writeline("The Money you have now are",money)

You have several options:
Concatenate the strings:
Console.Writeline("The Money you have now are" + money);
Use the format specifier version of Console.WriteLine:
Console.Writeline("The Money you have now are: {0}", money);
Use Console.Write instead:
Console.Write("The Money you have now are: ");
Console.Writeline(money);
Note:
Your code doesn't actually compile due to some missing parentheses, semi-colons and incorrect casing. I would write your code as this:
Console.WriteLine("Enter how much money you want");
int money = int.Parse(Console.ReadLine());
Console.WriteLine("The Money you have now is {0}", money);

As of C# 6, this can be written as:
Console.Writeline($"The Money you have now are: {money}");
See: $ - string interpolation (C# reference)

c# Script Error "Line3 is a' variable' but is used like a method - Help Understand

EDIT - Thank You Grant & Tim for the previous answer, however it doesn't look like my current code was able to turn the output into decimal form. How can i make the input of the user display as a decimal?
Console.WriteLine("*************** Get Mileage***************");
Console.WriteLine("");
Console.WriteLine("Enter the Gas Mileage:");
line3 = Console.ReadLine();
if (int.TryParse(line3, out val))
{
double mileage = Convert.ToDouble(line3());
Console.WriteLine("Your car MPG is: " + mileage.ToString());
Console.WriteLine();
Console.WriteLine("");
Console.WriteLine("*************** Program Termination***************");
Console.WriteLine("");
Console.WriteLine("Thank you. Press any key to terminate the program...");
}
else
{
Console.WriteLine("Please only enter a interger, Please Close and try again");
Console.ReadLine();
}

You've got a typo on this line:
Convert.ToDouble(line3());
By typing line3(), it suggests that line3 is a method you're trying to call.
Remove the extra parentheses:
Convert.ToDouble(line3);
Why are you doing an int.TryParse on line3, and then on the next line converting it to a double?
Just try parsing it as a double to start with, then use that parsed value:
double mpg;
if (double.TryParse(line3, out mpg))
{
Console.WriteLine("Your car MPG is: " + mpg);
...

Unhandled Exception: System.FormatException: Input string was not in a correct format

I'm trying to get this small movie ratings program to work properly with everything going fine until I start prompting for the ratings that the reviewer would enter. It lets me rate both acting fine but as soon as I hit the enter button to rate music is will move down to a blank line instead of prompting for the next input. The only way I to get around this seems for me to enter the value twice.
thanks
Console.WriteLine("Rate the following out of 5");
Console.Write("Acting > ");
acting_rating = int.Parse(Console.ReadLine());
Console.Write("Music > ");
Console.ReadLine();
music_rating = int.Parse(Console.ReadLine());
Console.Write("Cinematography > ");
Console.ReadLine();
cinematography_rating = int.Parse(Console.ReadLine());
Console.Write("Plot > ");
Console.ReadLine();
plot_rating = int.Parse(Console.ReadLine());
Console.Write("Duration > ");
Console.ReadLine();
duration_rating = int.Parse(Console.ReadLine());

you call Console.ReadLine(); one time too often... just remove the Console.ReadLine(); between Console.Write and the int.Parse .
Although IF the user enters anthing wrong - like a word instead of a number - you will still get an exception... To handle that properly use a try catch block and/or TryParse.

Excluding Acting, you have always two Console.ReadLine(); i.e. :
Console.Write("Music > "); // write Music >
Console.ReadLine(); // read the user input (and throw it away)
music_rating = int.Parse(Console.ReadLine()); // read the user input again and parse it
Remove the single statement Console.ReadLine(); and should be ok.

Writing an executable function in C#

I'm really new to all of this. I need to write an exe application in C#. What i need to do is to be able to pass values through the console into a function. But I'm unsure as to how I can store the values that are entered through the console...
I know we can use Read() to read what has been entered but, when I'm dealing with multiple values how do i do this?
Any help will be greatly appreciated!! Thanks in advance

You start with choosing the Console Application template (in New Project)
And then, in the Main function, you can read a line at a time with
string line = Console.ReadLine();
This probably shifts your question to : How do I get values from a string?
If you have a single int at a time, it is
int x = int.Parse(line);

Are you referring to passing command line parameters to a console application? If so, there is a string array parameter (e.g. args) that holds them. See this code.
static void Main(string[] args)
{
}
You can also use Environment.GetCommandLineArgs.

Hmm I think he is wondering how to repeatitly read some value and pass it to a function.
For that you can use a simple while loop.
string data = Console.ReadLine();
do {
dummyFunction(data);
data = Console.ReadLine();
} while (data != "");

You want to programmatically compile text into code? If so you should read this KB entry from Microsoft. How to programmatically compile code using C# compiler
Or if you want to get input from the user in the console, you should use Console.ReadLine().
Console.Write("Enter your name: ");
string name = Console.ReadLine();
Console.Write("Enter your age: ");
int age = int.Parse(Console.ReadLine());
Console.Write("Hello {0}, you are {1} years old.", name, age);

You can basically do a parsing work manually. For example, if the input is a name follows by age.
Natthawut 22
You can use Console.ReadLine() to get the string "Nattawut 22". And then use String.Split(' '); to get an array of {"Natthawut","22"}. Then convert the second element to integer using Convert.ToInt32(val);
I believe there must be a better way to do this but this is how I usually do it :)

int year, month, day;
Console.WriteLine("Please enter your birth year : ");
year = int.Parse(Console.ReadLine());
Console.WriteLine("Please enter your birth month : ");
month = int.Parse(Console.ReadLine());
Console.WriteLine("Please enter your birth day : ");
day = int.Parse(Console.ReadLine());
Console.Write("You are ");
Console.Write(CalculateAge(year, month, day));
Console.Write(" years old.");
An alternative way is this:
Console.WriteLine("Please enter your birthday in the format YY-MM-DD : ");
string line = Console.ReadLine();
string[] parts = line.Split(new char[] { '-' });
int age = CalculateAge(parts[0],parts[1],parts[2]);
Console.WriteLine("You are {0} years old.", age);
And -PLEASE- do some input checking.