52 questions
0
votes
0
answers
33
views
Pass `string[][]` as `InlineData to xUnit Theory? [duplicate]
In an xUnit theory I'd like to send an InlineData parameter of type string[][]. I can't seem to get it right. Is it doable, and if so, how?
I would expect this to work at least:
[InlineData(new string[...
- 1,623
3
votes
1
answer
596
views
ImmutableArray empty collection initializer is not equal to ImmutableArray.Empty in C# 12
It appears that C# 12's collection initializers don't produce the same result as a ImmutableArray's Empty property; for example:
using System;
using System.Collections.Immutable;
...
- 42.8k
30
votes
2
answers
2k
views
What does assignment to a bracketed expression mean in C#?
I'm reading Avalonia source code and I came across this sentence:
return new MenuFlyoutPresenter
{
[!ItemsControl.ItemsProperty] = this[!ItemsProperty],
[!ItemsControl.ItemTemplateProperty] = ...
1
vote
2
answers
75
views
Set inner object's member as outer object using the object initialization syntax in C#
Context
I have a List<T> of type Question.
Class Question, in turn, contains a List<Answer>.
Class Answer has a member called public Question Question { get; set; } which stores the ...
- 4,988
2
votes
1
answer
584
views
Collection initializers inside object initializers with default values
I just stumbled upon the following issue:
class Settings
{
// Let's set some default value: { 1 }
public ICollection<int> AllowedIds = new List<int>() { 1 };
}
static void Main(...
- 173k
1
vote
2
answers
151
views
Can't dynamically set array initializer length
I am using C# to hook into the FedEx API and I'm a bit stumped on how to modify some existing code to meet my needs. The snippet included is part of their canned code where they sample how to work ...
- 218
10
votes
4
answers
6k
views
Initialize elements with brackets like Lists in c#
I was thinking about arrays and lists and wondering if and how classes can get an implementation to be initializable like them. Let's take this class as basis:
class TestClass
{
private List<...
- 826
3
votes
3
answers
512
views
C# Collection initialization syntax for use with custom matrix class?
I'm creating a custom matrix class that only has a single 2D array to hold everything (I know that a 1D array is faster and better, but that's not the point of this implementation) the thing is, I'd ...
- 57
-2
votes
1
answer
72
views
function/method in a collection initializer c# [closed]
can i insert a method/function in a collection initializer? i am trying to insert expression in the function within a collection initializer but the variable in the class is asking for the declaration ...
- 9
-2
votes
1
answer
2k
views
Declaring a Dictionary<string,Func<>> with Functions already inside them c#
First of all, I don't even know what to use when passing on 4 parameters but no return value, I'll just use Func as an example.
I do not want to use Dictionary.Add to insert my function, I want it to ...
- 5
1
vote
2
answers
66
views
Initialization of list in class for availability from functions
I want initialize list with collection initializer values in class to make it available to use from separate functions:
public Form1()
{
InitializeComponent();
}
List<string> list = new ...
user6841064
2
votes
1
answer
405
views
initialize collection-member on a class [duplicate]
I have a class with that has a collection-property:
class MyClass
{
public MyCollection Coll { get; private set; }
public MyClass() { this.Coll = new MyCollection(); }
}
class MyCollection : ...
- 37.4k
0
votes
2
answers
191
views
System.Array does not support Add(), so how does collection initializer work?
In C# you can initialize an array like so:
var example = new int[] { 1, 4, 3 };
As quoted in Custom Collection Initializers:
The collection object to which a collection initializer is applied must ...
- 85
2
votes
1
answer
342
views
Asynchronous population of collection initializer
I would like to populate a collection using collection initializer that will call async methods:
public class Diagnostics
{
public async Task<IEnumerable<DiagnosticsInfo>> Get() => ...
- 46.1k
5
votes
1
answer
131
views
How to implement a clean Custom Object Initializer for a Matrix class
I have a custom Matrix class that I would like to implement a custom object initializer similar to what a double[,] can use but can not seem to figure out how to implement it.
Ideally I would like ...
- 7,613
1
vote
0
answers
171
views
Will EF7 support collection initializers?
C# 6 introduced some cool additions to how objects and collections are initialized.
For example this code is valid in C#6:
void Main()
{
var ints = new[] { 1, 2, 3, 4, 5 };
var myClass = new ...
- 14k
21
votes
4
answers
7k
views
C# 6.0's new Dictionary Initializer - Clarification [duplicate]
I've read that :
The team have generally been busy implementing other variations on
initializers. For example you can now initialize a Dictionary object
But looking at :
var Dic = new ...
- 149k
2
votes
0
answers
36
views
Collection initializer and TypeInitializationException vs IEnumerable [duplicate]
I have used collection initializer for a Dictionary and received a TypeInitializationException:
public static Dictionary<Environment.SpecialFolder, string> specialFolders = new Dictionary<...
- 1,903
2
votes
1
answer
568
views
How to call a method with the C# collection initializer?
Case
This morning I refactored some Logging method and needed to change a method's 'params' parameter in a normal array. Consequently, the call to the method had to change with an array parameter. I'...
- 5,036
7
votes
1
answer
7k
views
Using TextBoxFor to set HTML attributes that have a namespace prefix
I am converting some existing HTML to work with ASP.NET MVC, and have some forms containing input fields that have additional attributes (that, for now, I need to preserve) that contain a namespace ...
- 54.3k
6
votes
2
answers
322
views
Can another thread see partially created collection when using collection initializer?
Imagine this C# code in some method:
SomeClass.SomeGlobalStaticDictionary = new Dictionary<int, string>()
{
{0, "value"},
};
Let's say no one is using any explicit memory barriers or ...
- 1,121
4
votes
1
answer
2k
views
Object Initialization Not Working for Me
What am I missing here? I expected the following to work just fine:
public class ProposalFileInfo
{
public int FileId { get; set; }
public bool IsSupportDocument { get; set; }
}
// ...
var ...
- 68.1k
11
votes
5
answers
11k
views
Using collection initializer syntax on custom types?
I have a large static list which is basically a lookup table, so I initialise the table in code.
private class MyClass
{
private class LookupItem
{
public int Param1 { get; set; }
...
- 21.3k
14
votes
2
answers
429
views
Why are collection initializers on re-assignments not allowed?
I always thought it worked fine both ways. Then did this test and realized it's not allowed on re-assignments:
int[] a = {0, 2, 4, 6, 8};
works fine but not:
int [ ] a;
a = { 0, 2, 4, 6, 8 };
Any ...
- 334k
4
votes
3
answers
178
views
Creating a New Class with Collection Initializers in C# [duplicate]
I have a class that I created. I would like to allow the class to be able to have a collection initializer. Here is an example of the class:
public class Cat
{
private Dictionary catNameAndType = ...
- 28.4k