The Program in C# Program to read Temperature in Centigrade & Display Suitable Message is below:

using System;

namespace TemperatureCheck
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Hello Codeauri Family, enter the temperature in centigrade here :");
            float temp = Convert.ToSingle(Console.ReadLine());

            if (temp < 0)
            {
                Console.WriteLine("Hmm, its Freezing weather");
            }
            else if (temp >= 0 && temp <= 10)
            {
                Console.WriteLine("Very Cold weather");
            }
            else if (temp > 10 && temp <= 20)
            {
                Console.WriteLine("Cold weather");
            }
            else if (temp > 20 && temp <= 30)
            {
                Console.WriteLine("Normal in temperature");
            }
            else if (temp > 30 && temp <= 40)
            {
                Console.WriteLine("It's hot");
            }
            else
            {
                Console.WriteLine("OHH! It's very hot");
            }
        }
    }
}

Output:

Hello Codeauri Family, enter the temperature in centigrade here :
99
OHH! It’s very hot

Pro-Tips💡

Here are the step by step execution of above program:

1. The first line of the code using System; is an instruction to import the System namespace, which includes the Console class used for input/output operations.
2. The next line namespace TemperatureCheck creates a namespace for the code.
3. The next line class Program defines the class of the code.
4. The next line static void Main(string[] args) is the entry point of the code, which contains the logic of the program.
5. The next line Console.WriteLine("Hello Codeauri Family, enter the temperature in centigrade here :"); writes a message asking the user to enter the temperature.
6. The next line float temp = Convert.ToSingle(Console.ReadLine()); reads the temperature entered by the user, converts it to a single-precision floating-point number and stores it in the temp variable.
7. The next block of code is an if-else statement that checks the temperature entered by the user and displays a message indicating the weather based on the temperature value.
8. The code ends with a closing brace for the Main method, the Program class and the TemperatureCheck namespace.