C#

throw new ProgrammingQuestionInLoungeException();

Customer customer = null;
if(e.SomeObject is Customer)
    customer = (Customer)e.SomeObject;
else
    customer = null;

James Simpson wrote:

The () cast method is more effecient becuase as compiles down to a set of IL instructions that include checking the type before attempting the cast, or returning null, eg:

MyObject thing = new MyObject();

// 1. 
MyOtherObject otherThing = thing as MyOtherObject;

// 2.
MyOtherObject otherThing = (MyOtherObject) thing;

max00slo wrote:

I didnt find how to remove or edit the array of bytes... or i just forgot how to

byte[] x= File.ReadAllBytes("C:\\test.pdf"); //opens the file
            byte[] temp = new byte[x.Length-55]; //creates new byte array with the new size (minus 55 bytes)
            long tempx=1; // couter for the new array position
            for (long i = 56; i <= x.LongLength; i++) // for loop which starts after 55 byte. 
            {
                temp[tempx] = x[i]; // rewritting the new file with byte from 56 and on..
                tempx++; // the counter for the new byte array
            }
                    
            File.WriteAllBytes("C:\\test.pdf", temp); //after the loop, the new file is written