.net – Page 661 – Tarik Billa

What’s the difference between Invoke() and BeginInvoke()

September 18, 2022 by Tarik

Do you mean Delegate.Invoke/BeginInvoke or Control.Invoke/BeginInvoke? Delegate.Invoke: Executes synchronously, on the same thread. Delegate.BeginInvoke: Executes asynchronously, on a threadpool thread. Control.Invoke: Executes on the UI thread, but calling thread waits for completion before continuing. Control.BeginInvoke: Executes on the UI thread, and calling thread doesn’t wait for completion. Tim’s answer mentions when you might want to … Read more

Reminder – \r\n or \n\r?

September 18, 2022 by Tarik

I’d use the word ‘return‘ to remember, the r comes before the n.

Resolving MSB3247 – Found conflicts between different versions of the same dependent assembly

September 18, 2022 by Tarik

Change the “MSBuild project build output verbosity” to “Detailed” or above. To do this, follow these steps: Bring up the Options dialog (Tools -> Options…). In the left-hand tree, select the Projects and Solutions node, and then select Build and Run. Note: if this node doesn’t show up, make sure that the checkbox at the … Read more

How do I get the last day of a month?

September 18, 2022 by Tarik

The last day of the month you get like this, which returns 31: DateTime.DaysInMonth(1980, 08);

Passing a single item as IEnumerable

September 18, 2022 by Tarik

Well, if the method expects an IEnumerable you’ve got to pass something that is a list, even if it contains one element only. passing new[] { item } as the argument should be enough I think

What is the string length of a GUID?

September 18, 2022 by Tarik

It depends on how you format the Guid: Guid.NewGuid().ToString() = 36 characters (Hyphenated) outputs: 12345678-1234-1234-1234-123456789abc Guid.NewGuid().ToString(“D”) = 36 characters (Hyphenated, same as ToString()) outputs: 12345678-1234-1234-1234-123456789abc Guid.NewGuid().ToString(“N”) = 32 characters (Digits only) outputs: 12345678123412341234123456789abc Guid.NewGuid().ToString(“B”) = 38 characters (Braces) outputs: {12345678-1234-1234-1234-123456789abc} Guid.NewGuid().ToString(“P”) = 38 characters (Parentheses) outputs: (12345678-1234-1234-1234-123456789abc) Guid.NewGuid().ToString(“X”) = 68 characters (Hexadecimal) outputs: {0x12345678,0x1234,0x1234,{0x12,0x34,0x12,0x34,0x56,0x78,0x9a,0xbc}}

How is Math.Pow() implemented in .NET Framework?

September 17, 2022 by Tarik

MethodImplOptions.InternalCall That means that the method is actually implemented in the CLR, written in C++. The just-in-time compiler consults a table with internally implemented methods and compiles the call to the C++ function directly. Having a look at the code requires the source code for the CLR. You can get that from the SSCLI20 distribution. … Read more

Storing WPF Image Resources

September 17, 2022 by Tarik

If you will use the image in multiple places, then it’s worth loading the image data only once into memory and then sharing it between all Image elements. To do this, create a BitmapSource as a resource somewhere: <BitmapImage x:Key=”MyImageSource” UriSource=”../Media/Image.png” /> Then, in your code, use something like: <Image Source=”{StaticResource MyImageSource}” /> In my … Read more

Best way to read a large file into a byte array in C#?

September 17, 2022 by Tarik

Simply replace the whole thing with: return File.ReadAllBytes(fileName); However, if you are concerned about the memory consumption, you should not read the whole file into memory all at once at all. You should do that in chunks.

When should I use a List vs a LinkedList

September 17, 2022 by Tarik

In most cases, List<T> is more useful. LinkedList<T> will have less cost when adding/removing items in the middle of the list, whereas List<T> can only cheaply add/remove at the end of the list. LinkedList<T> is only at it’s most efficient if you are accessing sequential data (either forwards or backwards) – random access is relatively … Read more