VB.NET的隐藏功能？

Question

我已经学习了很多浏览C＃的隐藏功能，当我找不到类似于VB.NET的东西时，我感到很惊讶。

那么它的一些隐藏或鲜为人知的特征是什么？

Answer 1

该Exception When条款基本上未知。考虑一下：Public Sub Login(host as string, user as String, password as string, _                            Optional bRetry as Boolean = False)Try   ssh.Connect(host, user, password)Catch ex as TimeoutException When Not bRetry   ''//Try again, but only once.   Login(host, user, password, True)Catch ex as TimeoutException   ''//Log exceptionEnd TryEnd Sub

Answer 2

你有没有注意到Like比较运算符？    Dim b As Boolean = "file.txt" Like "*.txt"更多来自MSDNDim testCheck As Boolean' The following statement returns True (does "F" satisfy "F"?)'testCheck = "F" Like "F"' The following statement returns False for Option Compare Binary''    and True for Option Compare Text (does "F" satisfy "f"?)'testCheck = "F" Like "f"' The following statement returns False (does "F" satisfy "FFF"?)'testCheck = "F" Like "FFF"' The following statement returns True (does "aBBBa" have an "a" at the''    beginning, an "a" at the end, and any number of characters in ''    between?)'testCheck = "aBBBa" Like "a*a"' The following statement returns True (does "F" occur in the set of''    characters from "A" through "Z"?)'testCheck = "F" Like "[A-Z]"' The following statement returns False (does "F" NOT occur in the ''    set of characters from "A" through "Z"?)'testCheck = "F" Like "[!A-Z]"' The following statement returns True (does "a2a" begin and end with''    an "a" and have any single-digit number in between?)'testCheck = "a2a" Like "a#a"' The following statement returns True (does "aM5b" begin with an "a",''    followed by any character from the set "L" through "P", followed''    by any single-digit number, and end with any character NOT in''    the character set "c" through "e"?)'testCheck = "aM5b" Like "a[L-P]#[!c-e]"' The following statement returns True (does "BAT123khg" begin with a''    "B", followed by any single character, followed by a "T", and end''    with zero or more characters of any type?)'testCheck = "BAT123khg" Like "B?T*"' The following statement returns False (does "CAT123khg" begin with''    a "B", followed by any single character, followed by a "T", and''    end with zero or more characters of any type?)'testCheck = "CAT123khg" Like "B?T*"