Trailling lambda

[UseCser]

We can reference something features from other language， like kotlin
I love it(Trailing lambda) very much, and it is convenient for using
In C# we can use property like this:
public class C { public Int32 Age {get; set;} }
the property "Age" in java is used to writing a function, but in C# we can omit parentheses
In kotlin if the last parameter is lambda and we also can omit parentheses
https://kotlinlang.org/docs/lambdas.html#passing-trailing-lambdas
fun f(v:()->Unit) {xxx} fun main(){ f{ xxxx } }
Following this:
In c#
F(){} void F(Action a){}
In my idea we needn't omit parentheses because it will make diffrent meanings

[HaloFour]

See: #6122 although that discussion is currently locked

[UseCser]

thx, The same function in #1151