The Program in C# Program to Find largest,lowest values from 3 integer values is given below:

using System;

namespace FindLargestAndLowest
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Hello Codeauri Family, Enter the first number,Second number and Third Number below  to find lowest and Largest number: ");
            Console.WriteLine("Well,enter first integer: ");
            int num1 = Convert.ToInt32(Console.ReadLine());
            Console.WriteLine("Well,enter second integer: ");
            int num2 = Convert.ToInt32(Console.ReadLine());
            Console.WriteLine("Well,enter third integer: ");
            int num3 = Convert.ToInt32(Console.ReadLine());

            int largest = Math.Max(Math.Max(num1, num2), num3);
            int lowest = Math.Min(Math.Min(num1, num2), num3);

            Console.WriteLine("Okay.the largest integer is: " + largest);
            Console.WriteLine("Okay,the lowest integer is: " + lowest);
            Console.ReadLine();
        }
    }
}

Output:

Hello Codeauri Family, Enter the first number,Second number and Third Number below to find lowest and Largest number:
Well,enter first integer:
100
Well,enter second integer:
299
Well,enter third integer:
007
Okay.the largest integer is: 299
Okay,the lowest integer is: 7

Pro-Tips💡

Here are the step by step execution of above program:

1. Imports the “System” namespace to access the Console and Convert classes.
2. Defines a namespace “FindLargestAndLowest” containing a class “Program”.
3. In the “Main” method of the “Program” class:
   • Writes a message to the console asking the user to enter three integers.
   • Writes a message to the console asking the user to enter the first integer.
   • Reads the first integer entered by the user using the “ReadLine” method of the Console class, converts it to an integer using the “Convert.ToInt32” method, and stores it in the “num1” variable.
   • Repeats the same process for the second and third integers.
   • Finds the largest and lowest values from the three integers using the “Math.Max” and “Math.Min” methods, respectively.
   • Writes the largest and lowest values to the console using the “WriteLine” method.
   • Waits for the user to press enter using the “ReadLine” method of the Console class.