Just a disclaimer up front, I don’t have a ton of coding experience – just enough to let me partially understand what’s happening in this code, but I’m struggling with how to arrive at the answer. This block of code (I think is C#, could be JS) was given as part of a CTF challenge… Read More As part of a challenge, a piece of code is given – Having issues trying to get it running as intended

I have a base64 string that looks like this: data:image/png;base64,iVBORw0KGgoA…. And I need to convert the string to an image as byte array so I do: var b = Convert.FromBase64String(base64string); But I get an exception: System.FormatException: ‘The input is not a valid Base-64 string as it contains a non-base 64 character, more than two padding… Read More Exception when converting base64 image to byte array

Im learning C#, and i want to repeat part of my code, if person types not a digit. SO, if person types a letter, everything seems fine, and the loop repeats. But, if the person just click enter, program breaks. First loop works correct, if you click enter, it starts again, but the seond, idk… Read More how can i make the loop restart when i press enter?

Here’s the code using System; public class WrappedInt { private int Value { get; } public WrappedInt(int value) { Value = value; } // Comparison in Main works when this is defined: public static implicit operator int(WrappedInt wInt) => wInt.Value; // But doesn’t work with this INSTEAD: // public static implicit operator WrappedInt(int value) =>… Read More The "==" operator with implicit type conversion. Why does it work only when I define implicit conversion inside A for A->B and not for B->A?

my issues I can not use the ‘play’ button nor CTRL+f5. Why does it not let me play the code and open a console. I tried to open a console with the words "Hello World", but it doesn’t let me open up a console, at least I think. >Solution : Your solution has no projects.… Read More I just started with C#, following the freeCodeCamp.org tutorial, and I was wondering why this code doesn't work

my issues I can not use the ‘play’ button nor CTRL+f5. Why does it not let me play the code and open a console. I tried to open a console with the words "Hello World", but it doesn’t let me open up a console, at least I think. >Solution : Your solution has no projects.… Read More I just started with C#, following the freeCodeCamp.org tutorial, and I was wondering why this code doesn't work

My code string? SegroupOf; if(SegroupOf.Contains("Team")) { } If SegroupOf is null it throws an error. How to handle null? I have given SegroupOf as nullable, how to make sure even if its null it doesnot throw any error >Solution : You can use the null-conditional-operator like so: if(SegroupOf?.Contains("Team") == true) However as SegroupOf?.Contains returns a… Read More C# – contains throws null exception

I am trying to store the value from an object into a string variable. If the object is null , it will shows an error "object reference not set to an instance of an object". If I try to store the value from SupPhone.PhoneNumber into a string variable and if it has the value, it… Read More How can I move the value from an object into a string variable

I would like to remove elements from a list at once. Not in a loop. Currently I am passing a from index number as a starting number and then removing it in a loop which is causing a lot of problems. Is there a way to remove all at once? Basically remove from index 3… Read More Remove from a list from starting index at once

I have a class that has a bunch of properties of certain type , this type has 3 events and I want to subscribe to this events on my class constructor, but avoiding typing each property name 3 times, is this possible? Something like iterate trough all the properties of this type and add the… Read More Programatically adding event handlers for all properties of <T>