Collection was modified after the enumerator was instantiated Colon in Api Get Request URL Column 'opOrderID' is constrained to be unique. Value xxxx is already present. Column mapping while importing Excel to sql database table Column named ABC cannot be found. Parameter name: columnName COM ...
IEnumerable is an interface that defines one method GetEnumerator which returns an IEnumeratorinterface, this in turn allows readonly access to a collection. A collection that implements IEnumerable can be used with a foreach statement. Definition IEnumerable public IEnumerator GetEnumerator(); IEnumera...
http://www.microsoft.com/china/msdn/library/langtool/vcsharp/vbconcprogramminglanguagefuturefeatures.mspx 1. Generic Type 泛型 定义一个MyList<T>,对这个MyList类设定方法,方法中,使用T而不是具体的类型float或者int什么的,忽略了类型的区别 MyList<MyClass> list1 = new MyList<MyClass>(); MyList<...
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The async keyword must be presented in the signature of the method that makes asynchronous calls. Briefly, you can use the await keyword only if the async keyword is in the method signature. The same is true for lambda expressions. This post presents just a short description of the feature....
In this line of code, you declare myFavoriteColor to be of type RainbowColors. This variable is restricted to store any of the specified VIBGYOR colors and no other values. Note The compiler converts the enumerator such as Violet and so on into integers. Each enumerated value specified is ...
Fixed warning C4061 "enumerator 'enumerator' in switch of enum 'enumeration' is not explicitly handled by a case label." This warning is off-by-default and was fixed as an exception to the standard library's general policy for warnings. (The standard library is /W4 clean, but doesn't ...
Is it important for any new implementation to have roughly equivalent (or smaller) code size than the existing one, since there are typically lots of different instantiations of the dictionary type + its enumerator? Is code hygiene a high priority for BCL classes like this? My original prototype...
Frequent Event ID 7036 - The Portable Device Enumerator Service service entered the stopped/running state. FSMO- Role Error FTP coonection refused FTP error 425 FTP error 550 ftp map drive with group policy FTP over internet FTP Server "Failed to retrieve directory listing" FTP Server Can't Lo...
Device Status: 0180200A [DN_DRIVER_LOADED|DN_STARTED|DN_DISABLEABLE|DN_NT_ENUMERATOR|DN_NT_DRIVER]Device Problem Code: No ProblemDriver Problem Code: UnknownDisplay Memory: 12177 MBDedicated Memory: 4039 MBShared Memory: 8137 MBCurrent Mode: 2560 x 1440 (32 bit...