* Primary constructors, to reduce programming overhead by putting constructor arguments directly in scope throughout a class, obviating the need to explicitly declare a backing field.
* Top level statements and member declarations, embracing a scripting dialect within C#.
* To avoid capturing any local state when supplying lambda functions for method arguments, the lambda declaration would be prefixed with the static keyword.

• Simplified parameter null validation code, allowing for standard null validation on parameters to be simplified using a small annotation on parameters.
  Лучше бы какое-нибудь легковесное AOP запланировали для этих целей, которое позволит все такие аннотации делать самому.
  
• Records, a simplified declaration form for C# class and struct types combining benefits of similar features. Records provide a mechanism for declaring a datatype by describing members of the aggregate as well as additional code or deviations from the usual boilerplate, if any.
  Зачем нужны records если есть primary constructor для меня загадка. Да и в целом зачем нужны records.
  
• Scripting dialect тоже довольно странная идея.

K>Судя по тенденциям, горшочек — "ночной"?

class UserService {
  private readonly IDbContext dbContext;

  public UserService(IDbContext dbContext) {
    this.dbContext=dbContext;
  }
}

class UserService(IDbContext dbContext) {
}

class Test {
    constructor(private dbContext:IDbContext) {
    }
}

class Test {
S>    constructor(private dbContext:IDbContext) {
S>    }
S>}

C# 9.0 begins to take shape

var someVariable, someOtherVariable, oneMoreVariable: SomeType;

SomeType someVariable, someOtherVariable, oneMoreVariable;

function GetLength(x: float, y: float, z: float): float

a * b;

class Test {
S>>    constructor(private dbContext:IDbContext) {
S>>    }
S>>}

public class Test {
  public Test(private IDbContext dbContext,public IDbContext dbContext2) {
    }