Начал с типов данных

CSHARP/Program.cs

@@ -1,2 +1,16 @@
-// See https://aka.ms/new-console-template for more information
-Console.WriteLine("Hello, World!");
+//типы данных
+int age = 25;
+double price = 19.99;
+string name = "Vasya";
+bool active = true;
+char symbol = 'S';
+decimal tax = 15.99M;
+DateTime today = DateTime.Now;
+List<string> names = new List<string> { "Vasya", "Petya" };
+Dictionary<int, string> students = new Dictionary<int, string>
+{
+    {1, "Alice" },
+    {2, "Frank" },
+    {3, "Ivan"}
+};
+string[] days = { "Mon", "Tue", "Wed" };