This is not a good question - we cannot work out from that little what you are trying to do.
Remember that we can't see your screen, access your HDD, or read your mind - we only get exactly what you type to work with.
So typing as little as possible help no-one - we don't even know what kind of app you are writing, so we can't give you any specific information!
Try again, this time explaining as if to someone who knows absolutely nothing about your project and is at the other end of a telephone.
Tell us what you have tried, where you are stuck, what help you need - and be specific!
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
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Unable to see traces and Service in Jaeger UI on host server, used C# client (tracer) for Jaeger but able see traces in local environment using "jaeger-all-in-one --collector.zipkin.http-port=9411"
I have tried below code and Referred link as
public static class JaegerTracingServiceCollectionExtensions
public static IServiceCollection AddJaegerTracing(
this IServiceCollection services,
Action<jaegertracingoptions> setupAction = null)
if (setupAction != null) services.ConfigureJaegerTracing(setupAction);
var options = cli.GetService<ioptions<jaegertracingoptions>>().Value;
var senderConfig = new Jaeger.Configuration.SenderConfiguration(options.LoggerFactory)
var reporter = new RemoteReporter.Builder()
var sampler = new GuaranteedThroughputSampler(options.SamplingRate, options.LowerBound);
var tracer = new Tracer.Builder(options.ServiceName)
// Allows code that can't use dependency injection to have access to the tracer.
I am beginner in C# and I am building an application to create a workbook (Book1.xlsx) then copy a specific sheet from another workbook ( Book2.xlsx ).
I created Book1 but I am trying to copy Sheet1 from Book2 but I could not.
before copying [Sheet1 from Book2 ] I am dong a kind of check to collect names for all opened workbooks so I could not be able to get names of workbooks which opened by Visual Studio c# by the below piece of code but If will open the same workbooks by myself I found the below code can get the name of opened workbooks without problem.
I`m working on a graphics editor. I was trying to implement a gui in DirectX but I realised that`s not the right approach. I`m used to C# Forms so I was asking myself if I can stitch C# GUI (Forms) and C++ DirectX together. Any help is welcome.
WinForms is also not the right approach. Use WPF instead.
".45 ACP - because shooting twice is just silly" - JSOP, 2010 ----- You can never have too much ammo - unless you're swimming, or on fire. - JSOP, 2010 ----- When you pry the gun from my cold dead hands, be careful - the barrel will be very hot. - JSOP, 2013
I need a usable license plate recognition program for my thesis. I would like to use it for entry access control. I wrote my program in C# language and the recogniser should be detect plate from images. I really appreciate any help or suggestion.
I want to detect europen plates, especially Hungarian and area.
Something you need to consider when you put strings in place using syntax like string s1 = "1,2"; or myClass.CallMethod("3,4");; these strings are interned in the string pool. In other words, the string is not garbage collected until the tests finish and the AppDomain is unloaded.
In terms of memory management they are the same. When you inline a string it still creates a string object which is stored in memory, the only difference is that it isn't assigned to a variable. Same with the int. In terms of performance, if you are in debug mode then you could argue the first version will perform worse due to the variable allocations, but we're talking single cpu cycles of difference. In release mode both of those code samples will effectively compile to the same code as the optimiser will inline the variables for you.
As for when they are deallocated, a test method is no different from any other method so the variables will be handled like normal.
the .NET String class is a reference type, correct?
Why then must I add the ref keyword to a string argument if I want its value to be updated in the called function?
No other reference type behaves this way, correct?
UPDATE: I just realized what's going on. Strings are immutable so when you pass a string with the ref keyword, it's the original reference to the string that is being updated with the new string. Without the ref keyword, the called function gets its own reference to the string, and if changes are made, then it's the function's reference that is updated, not the original reference.
The difficult we do right away...
...the impossible takes slightly longer.
I look at 'string as a chimera: a reference type (heap allocated , a class, no fixed allocation size, can be 'null) with value type semantics (immutability). Adding to the inter-species flavor is that == will compare content, not references. Under the hood a Char.
 Eric Lippert's blogs illuminate the complexity of strings and memory allocation in .NET:
"It is simply false that the choice of whether to use the stack or the heap has anything fundamentally to do with the type of the thing being stored. The truth is: the choice of allocation mechanism has to do only with the known required lifetime of the storage."
i like to confuse my students by asking them: if a Point is a ValueType (immutable), why can you set its X/Y properties directly without creating a new copy. To (maybe) get across the idea that immutable and passed by value are not necessarily synonymous.
«One day it will have to be officially admitted that what we have christened reality is an even greater illusion than the world of dreams.» Salvador Dali
the .NET String class is a reference type, correct?
No, it's a value type. Even though strings are heap-based, .net does smoke-and-mirrors behind the scenes to ensure strings behave like value types. Probably to make the language easier to use as strings are very common. The downside is that it can lead to poor performance if you're not aware of the caveats.
No, it's an immutable reference type. There's not much in the way of smoke-and-mirrors involved; you can easily create your own immutable reference type to get the same behaviour.
If string was really a value type, you wouldn't sensibly be able to have a value type with a string member. The entire string would be stored "in-line" within that struct, and you'd end up with stack overflow exceptions everywhere.
It's probably better to say that in some circumstances it's easier to think of string as a value type, even though it isn't.
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