c# - Bang vs Default Property in Visual Basic -

for given class, default property of list, can access instance object in list doing myclass.defproperty("key"). can achieve same results typing myclass.defproperty!key.

i have been told using parenthesis , quotes faster way runtime accesses property, i'd understand difference , how each work...

i understand c# has similar behavior replacing parenthesis square brackets.

given following code in visual basic.net:

dim x new dictionary(of string, string) x.item("foo") = "bar" 

you can access "foo" member of dictionary using of following:

dim = x!foo dim b = x("foo") dim c = x.item("foo") 

if @ il under reflector.net you'll find translate to:

dim string = x.item("foo") dim b string = x.item("foo") dim c string = x.item("foo") 

so, equivalent in il and, of course, execute @ same speed.

the bang operator lets use statically defined keys conform standard variable naming rules.

using indexed approaches keys can valid value (in case string) , can use variables represent key.

for code readability recommend x.item("foo") notation is clear going on. x("foo") can confused call procedure , x!foo makes foo variable , not string (which is). stack overflow color-coding makes foo keyword!

the c# equivalent code x["foo"];. there no ! syntax equivalent.

so, bottom-line ! isn't better or worse on performance , may make code maintenance more difficult should avoided.