Some Code Style Make the code more and more clearly

[sgf]

if( s?)    //if (s!=null)

if (s in {"a","aaa","bbb"})    //if(string[]{"a","aaa","bbb"}.contains(s))

for(d=1..100)    //for(int d=1;d<=100;d++;)

for(f=1.0f..100)    //for(float f=1.0f;f<100.0;f=f+0.1f )


if(var size=sizeof(structA);size>12)
{...}

these just little some ways maybe will Make the C# Code clearly

Just discuss whether they will be adopted

welcome to Add your ideas.

[Logerfo]

See #420

[sharwell]

@sgf It tends to work well to separate ideas into one idea per issue, since GitHub only allows one discussion thread per issue.

if( s?)

Duplicate of #196 and/or #545, and later #833.

if (s in {"a","aaa","bbb"})

Duplicate of #420.

for(d=1..100)
for(f=1.0f..100)

Essentially a duplicate of #198.

[Joe4evr]

if( s?) //if (s!=null)

This one is gonna be if (s is {} nonNullS) as per this comment by Gafter.

[bondsbw]

@Joe4evr

if (s is {} nonNullS)

Meh, that is terribly unreadable. I'll rarely if ever use it.

But I'd probably use this regularly:

if? (expression) ...

if? checks whether expression is null. (Like if, it would accept an else clause.)

I chose this syntax over the proposal because if (s?) leads to ambiguities with the null-conditional operator, as explained by @HaloFour in #833.

[orthoxerox]

if (s!=null) is probably one construct that I've never wanted to replace with some sugar. It's easy to write and easy to read, its meaning is obvious.

[sgf]

@orthoxerox
but when some time,

if (SomeLongNameVars!=null && someDictionary[keyworld]!=null&& someDataRow[Colume]!=null)
//
if (SomeLongNameVars? && someDictionary[keyworld]? && someDataRow[Colume]?)

thats will be little better

if the same code in linq or lambda,thats will be more usefully

[sgf]

i have another idea like this.
most time we use some code like this:

if(someDictionary[keyworld]==null? ){someDictionary[keyworld]=11 }
//can we  write like this:
someDictionary[keyworld]?=11;

[aluanhaddad]

I really like

if (s is null)

[ufcpp]

s? is probably inspired by Swift's let s? pattern. However, my first impression for s? is s == null because ? means nullable. It is not intuitive that s? means not-null.

[sgf]

if(var size=callMethod;size>12)
{...}

this style is good,and the golang,C++ has supported. maybe python too;