C# Arrays

Arrays in C# are fixed-size data structures that store elements of the same type. They are declared with a specific size and type.

int[] numbers = new int[] { 10, 20, 30, 40, 50 };
int first = numbers[0];
int count = numbers.Length;

C# Multithreading

Multithreading enables concurrent execution in C#. The Thread class and the Task class are commonly used.

System.Threading.Thread thread = new System.Threading.Thread(() =>
{
    Console.WriteLine("Thread running");
});
thread.Start();
thread.Join();

Task task = Task.Run(() => Console.WriteLine("Task running"));
task.Wait();

C# internal Keyword

The internal access modifier restricts visbiility to within the same assembly.

internal class RestrictedClass
{
    public void DoWork() { }
}

C# LINQ

Language Integrated Query (LINQ) provides a SQL-like syntax for querying collections.

int[] data = { 1, 2, 3, 4, 5 };
var evenValues = from d in data
                 where d % 2 == 0
                 select d;

foreach (int v in evenValues)
{
    Console.WriteLine(v);
}

C# HttpClient Usage

HttpClient is used to send HTTP requests and receive responses asynchronously.

using (HttpClient client = new HttpClient())
{
    HttpResponseMessage response = await client.GetAsync("https://example.com/api/data");
    if (response.IsSuccessStatusCode)
    {
        string content = await response.Content.ReadAsStringAsync();
        Console.WriteLine(content);
    }
}