boxing

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Is there a way to measure boxing/unboxing penalties?

I\'m working with a framework that uses collections derived from System.Collections.CollectionBase.Users have been complaining about performance, and I feel that these collections, which are very heav[详细]

2023-01-24 19:37 分类：问答
Why doesn't delegate contravariance work with value types?

This snippet is not compiled in LINQPad. void Main() { (new[]{0,1,2,3}).Where(IsNull).Dump(); } static bool IsNull(object arg) { return arg == null; }[详细]

2023-01-23 17:34 分类：问答
Get value from Dictionary<string, object> without unboxing?

I was wondering if it\'s possible to run the following code but without the unboxing line:- t.Value = (T)x;[详细]

2023-01-21 04:49 分类：问答
How to "box" a value WITHOUT using programming language's boxing support?

I want to box a value without using whatever .NET language\'s built-in support for that. That is, given an enum value I want an reference type object that represents that value and its type.[详细]

2023-01-21 00:48 分类：问答
Assigning an array of structure to another array of same structure

In Vb.net I am trying to assign an array of structure to another array of same structure Dim info() As assemblyInfo[详细]

2023-01-19 12:34 分类：问答
How is the boxing/unboxing behavior of Nullable<T> possible?

Something just occurred to me earlier today that has got me scratching my head. Any variable of type Nullable<T> can be assigned to null. For instance:[详细]

2023-01-17 01:31 分类：问答
What is the difference between ((IEnumerable)source).OfType<T>() and source as IEnumerable<T>

What is the difference between ((IEnumerable)source).OfType<T>() and source as IEnumerable<T>[详细]

2023-01-16 11:13 分类：问答
Unboxing uint/int without knowing what's inside the box

I have an object o that is known to be a boxed int or uint: object o = int.MinValue object o = (uint)int.MinValue // same bytes as above[详细]

2023-01-13 10:42 分类：问答
Does var keyword in C# cause boxing?

My boss forbids me to us开发者_Python百科e var as it would cause boxing and slowing down the app.[详细]

2023-01-12 16:42 分类：问答
boxing and unboxing, why aren't the outputs both "System.Object"?

I got the following code: object var3 = 3; Console.WriteLine(var3.GetType().ToString()); Console.WriteLine(typeof(object).ToString());[详细]

2023-01-10 18:24 分类：问答