public class Serializer
{
    public byte[] Serialize(object obj) 
    {
        throw new NotImplementedException();
    }
}

public interface ISerializer
{
    byte[] Serialize(object obj);
}

public interface ISerializer
{
    byte[] Serialize(object obj);
}

public interface ISerializer
{
    byte[] Serialize<T>(T obj);
}

public class Person
{
    public string Name {get;set;}
}

public record Person(string Name);

public record Person
{
    public string Name { get; set; } = default!;
};

public class Namer
{
    public List<string> SuggestNames() { ... } 
}

public class Namer
{
    public IEnumerable<string> SuggestNames() { ... } 
}

public class ServiceClass
{
    private ICaller mCaller; 

    ServiceClass(ICaller caller)
    {
        mCaller= caller;
    }
}

public class ServiceClass
{
    private readonly ICaller mCaller; 

    ServiceClass(ICaller caller)
    {
        mCaller= caller;
    }
}

string a = "Hello";
string b = " World";
Console.WriteLine(a + b + "!");

string a = "Hello";
string b = "World";
Console.WriteLine($"{a} {b}!");

StringBuilder builder = new StringBuilder();
builder.Append("Hello");
builder.Append(" World");
builder.Append("!");

Console.WriteLine(builder.ToString());

object MyObj = fromObject;

if(myObj is Developer)
{
    Developer d = myObj as Developer;
    if(d.YearsOfProgramming > 5)
    {
        Console.WriteLine($"{d.name} is a senior dev!");
    }
    // Do something with d....
}

object MyObj = fromObject;

var description = myObj switch
{
    Developer d when d.YearsOfProgramming is >= 5 => $"{d.name} is a senior dev!",
    Developer d when d.YearsOfProgramming is < 5 => $"{d.name} is a junior dev!",
    Person p => $"{p.Name} is not a developer",
    _ => "Not a person"
};

Console.WriteLine(description);

[TypeAttribute(typeof(string))]
public string Method() => default;

[GenericAttribute<string>()]
public string Method() => default;

struct Data
{
    public Span<byte> Image;
}

ref struct Data
{
    public Span<byte> Image;
}

public Task<byte[]> Read(Stream s);

public ValueTask<byte[]> Read(Stream s);