大约有 5,700 项符合查询结果（耗时：0.0175秒） [XML]
Collection was modified; enumeration operation may not execute
...
As of .NET Core 3.0 with C# 8.0, a dictionary may modified during enumeration (foreach) via .Remove and .Clear only. This does not apply to other collections.
– Super Jade
Jul 11 at 3:40
...
Is if(items != null) superfluous before foreach(T item in items)?
...
Using C# 6 you could use the new null conditional operator together with List<T>.ForEach(Action<T>) (or your own IEnumerable<T>.ForEach extension method).
List<string> items = null;
items?.ForEach(item =>...
What is the difference between Server.MapPath and HostingEnvironment.MapPath?
...
Not the answer you're looking for? Browse other questions tagged c# asp.net or ask your own question.
No connection could be made because the target machine actively refused it?
...nguages and platforms have basically the same API in this regard, even the C# one. This parameter is often configurable if you control the server, and is likely read from some settings file or the registry. Investigate how to configure your server.
If you wrote the server, you might have heavy pr...
How to deal with “java.lang.OutOfMemoryError: Java heap space” error?
...using. One common mistake with garbage collected languages such as Java or C# is to keep around references to objects that you no longer are using, or allocating many objects when you could reuse them instead. As long as objects have a reference to them they will continue to use heap space as the ga...
'is' versus try cast with null check
...myObjRef is already MyType and doesn't need to be cast again
...
}
C# 7.0 supports a more compact syntax using pattern matching:
if (myObj.myProp is MyType myObjRef)
{
...
}
share
|
im...
Check difference in seconds between two times
...
Not the answer you're looking for? Browse other questions tagged c# or ask your own question.
variable === undefined vs. typeof variable === “undefined”
...as been defined) somewhere in the source code. (more or less). If you know C# or Java, this type of check is never done because if it does not exist, it will not compile.
<== Fiddle Me ==>
share
|
...
datetime.parse and making it work with a specific format
...
Not the answer you're looking for? Browse other questions tagged c# asp.net .net-2.0 or ask your own question.
WPF OpenFileDialog with the MVVM pattern? [duplicate]
...
Not the answer you're looking for? Browse other questions tagged c# wpf xaml mvvm openfiledialog or ask your own question.