Learning Path Details

using System;
using System.Collections.Generic;

namespace ConsoleUI
{
	internal class Program
	{
		private static void Main(string[] args)
		{
			//Start counting guests at 0
			int totalguests = 0;
			// Initialize guest list
			List<string> guestlist = new List<string>();
			// Initialize done checker
			string done;

			do
			{
				//Get user name
				string guestname = GetGuestName();
				//Add name to guest list
				guestlist.Add(guestname);
				//Get # of people in party
				int partysize = GetPartySize();
				//Add # of people to total guests
				totalguests += partysize;
				//Ask if done
				Console.Write("Done (yes/no): ");
				done = Console.ReadLine();
				//If not done loop back to get user name
				//If done move on
			} while ( done.ToLower() != "yes" );

			//Print out list of people
			//Print out total # of people
			DisplayGuestList(guestlist, totalguests);

			_ = Console.ReadLine();
		}

		private static string GetGuestName()
		{
			Console.Write("What is the name of your party: ");
			string output = Console.ReadLine();
			return output;
		}

		private static int GetPartySize()
		{
			bool issizevalid;
			int output;

			do
			{
				Console.Write("How many people in your party: ");
				string partysize = Console.ReadLine();
				issizevalid = int.TryParse(partysize, out output);
				if ( !issizevalid )
				{
					Console.WriteLine("Please enter the number using digits.");
				}
			} while ( !issizevalid );

			return output;
		}

		private static void DisplayGuestList(List<string> guestList, int totalGuests)
		{
			Console.WriteLine("Party Guest List");
			foreach ( string guest in guestList )
			{
				Console.WriteLine(guest);
			}

			Console.WriteLine($"Total Guests: {totalGuests}");
		}
	}
}

using System;

namespace ConsoleUI
{
	internal class Program
	{
		private static void Main()
		{
			WelcomeUser();
			string name = GetUserName();
			SayHello(name);
			_ = Console.ReadLine();
		}

		private static void WelcomeUser()
		{
			Console.WriteLine("Welcome to Foundation in C#!");
		}

		private static string GetUserName()
		{
			Console.Write("What is your first name: ");
			string output = Console.ReadLine();
			return output;
		}

		private static void SayHello(string firstName)
		{
			Console.WriteLine($"Hello {firstName}!");
		}
	}
}

using System;
using System.Collections.Generic;

namespace ConsoleUI
{
	internal class Program
	{
		private static void Main()
		{
			List<string> firstnames = new List<string>();
			string morenames;

			do
			{
				Console.Write("Enter a first name: ");
				firstnames.Add(Console.ReadLine());
				Console.Write("Any more (yes/no)? ");
				morenames = Console.ReadLine();
			} while ( morenames.ToLower() != "no" );

			foreach ( string firstname in firstnames )
			{
				Console.WriteLine($"Hello {firstname}!");
			}

			_ = Console.ReadLine();
		}
	}
}

using System;

namespace ConsoleUI
{
	internal class Program
	{
		private static void Main()
		{
			Console.Write("Enter a comma-separated list of first names (no spaces): ");
			string firstnamelist = Console.ReadLine();
			string[] firstnames = firstnamelist.Split(',');

			for ( int i = 0; i < firstnames.Length; i++ )
			{
				Console.WriteLine($"Hello {firstnames[i]}!");
			}

			_ = Console.ReadLine();
		}
	}
}

using System;
using System.Collections.Generic;

namespace ConsoleUI
{
	internal class Program
	{
		private static void Main()
		{
			Dictionary<int, string> employees = new Dictionary<int, string>
			{
				[1] = "Tim",
				[2] = "Sue",
				[3] = "Bob"
			};

			Console.Write("Enter your Employee ID: ");
			string employeeidtext = Console.ReadLine();
			bool isidvalid = int.TryParse(employeeidtext, out int employeeid);
			if ( isidvalid && employeeid > 0 && employeeid < 4 )
			{
				Console.WriteLine($"Welcome {employees[employeeid]}!");
			}
			else
			{
				Console.WriteLine("That is not a valid ID.");
			}

			_ = Console.ReadLine();
		}
	}
}

using System;
using System.Collections.Generic;

namespace ConsoleUI
{
	internal class Program
	{
		private static void Main()
		{
			List<string> studentnames = new List<string>();
			int studentcount = 0;
			string morestudents;

			do
			{
				Console.Write("Enter Student Name: ");
				studentnames.Add(Console.ReadLine());
				studentcount++;
				Console.Write("More Students (yes/no): ");
				morestudents = Console.ReadLine();
			} while ( morestudents == "yes" );

			Console.WriteLine($"You entered {studentcount} students.");

			_ = Console.ReadLine();
		}
	}
}

using System;

namespace ConsoleUI
{
	internal class Program
	{
		private static void Main()
		{
			string[] names = new string[] { "Tim", "Sue", "Bob" };

			Console.Write("Pick a number from 1 to 3: ");
			string numbertext = Console.ReadLine();

			bool isvalidnumber = int.TryParse(numbertext, out int number);

			if ( !isvalidnumber || number < 1 || number > 3 )
			{
				Console.WriteLine("That is not a valid number.");
				_ = Console.ReadLine();
				return;
			}

			Console.WriteLine($"The name in position {number} is {names[number - 1]}.");

			_ = Console.ReadLine();
		}
	}
}

using System;

namespace ConsoleUI
{
	internal class Program
	{
		private static void Main()
		{
			string name;

			do
			{
				Console.Write("What is your name: ");
				name = Console.ReadLine();
				if ( name.ToLower() == "tim" )
				{
					Console.WriteLine("Hello Professor");
				}
				else if ( name.ToLower() != "exit" )
				{
					Console.WriteLine($"Hi {name}");
				}
			} while ( name.ToLower() != "exit" );
		}
	}
}

using System;

namespace ConsoleUI
{
	internal class Program
	{
		private static void Main()
		{
			Console.Write("What is your first name: ");
			string firstname = Console.ReadLine();

			Console.Write("How old are you: ");
			string agetext = Console.ReadLine();

			bool isagevalid = int.TryParse(agetext, out int age);

			if ( firstname.ToLower() == "bob" || firstname.ToLower() == "sue" )
			{
				Console.WriteLine($"Hello Professor {firstname}");
			}
			else
			{
				Console.WriteLine($"Hello {firstname}");
			}

			if ( isagevalid )
			{
				if ( age < 21 )
				{
					int yearstowait = 21 - age;
					Console.WriteLine($"I recommend you wait {yearstowait} years before starting this class");
				}
			}
			else
			{
				Console.WriteLine("You must enter your age in digits");
			}

			_ = Console.ReadLine();
		}
	}
}

using System;

namespace ConsoleUI
{
	internal class Program
	{
		private static void Main()
		{
			Console.Write("How old are you: ");
			string agetext = Console.ReadLine();

			bool isagevalid = int.TryParse(agetext, out int age);

			if ( isagevalid )
			{
				age -= 21;

				if ( age < 0 )
				{
					Console.WriteLine("You were not born yet in the year 2000!");
				}
				else
				{
					Console.WriteLine($"You were {age} years old in the year 2000.");
				}
			}
			else
			{
				Console.WriteLine("Please enter your age using digits.");
			}

			_ = Console.ReadLine();
		}
	}
}

using System;

namespace ConsoleUI
{
	internal class Program
	{
		private static void Main()
		{
			Console.Write("What is your first name: ");
			string firstname = Console.ReadLine();

			if ( firstname.ToLower() == "tim" )
			{
				Console.WriteLine("Hello Professor!");
			}
			else
			{
				Console.WriteLine("Hello Student!");
			}

			_ = Console.ReadLine();
		}
	}
}

using System;

namespace ConsoleUI
{
	internal class Program
	{
		private static void Main()
		{
			string firstname = "Pierre";
			string lastname = "Plourde";

			string fullname = $"{firstname} {lastname}";

			int age = 47;

			bool isalive = true;

			string phonenumber = "905-439-7645";

			Console.WriteLine($"Hi, {fullname}, you are {age} years old, your phone number is {phonenumber}, and you are alive? {isalive}.");

			_ = Console.ReadLine();
		}
	}
}