You can try to generate an image from the byte array and check for the ArgumentException if its not. public static bool IsValidImage(byte[] bytes) { try { using(MemoryStream ms = new MemoryStream(bytes)) Image.FromStream(ms); } catch (ArgumentException) { return false; } return true; }
In .net 4.0 Microsoft removed the ability to add DLLs to the Assembly simply by dragging and dropping. Instead you need to use gacutil.exe, or create an installer to do it. Microsoft actually doesn’t recommend using gacutil, but I went that route anyway. To use gacutil on a development machine go to: Start -> programs … Read more
ANOTHER UPDATE: Since 2015 the compiler team has been making an effort to get sources of non-determinism out of the compiler toolchain, so that identical inputs really do produce identical outputs. See the “Concept-determinism” tag on the Roslyn github for more details. UPDATE: This question was the subject of my blog in May 2012. Thanks … Read more
Yes, there are two distinct GACs as from .NET 4.0 See here: .NET 4.0 has a new GAC, why? As stated below, the new physical location is %windir%\Microsoft.NET\assembly\ (you can interogate it using the dir command at a command prompt if you’re interested). It’s worth noting that applications running up to the 2.0 CLR will … Read more
Windows crops the edges of the window when it’s maximized to obscure what would normally be the resize edges. You can get around this by putting a proxy border between the window and your content and then inflate the thickness when it’s maximized. I modified the example that came with the lib to do this, … Read more
The opensource framework Impromptu-Interface was designed to do this. It generates a cached lightweight proxy with a static interface and uses the dlr to forward the invocation to the original object. using ImpromptuInterface; public interface ISimpeleClassProps { string Prop1 { get; } long Prop2 { get; } Guid Prop3 { get; } } – dynamic … Read more
Tuples originated in functional programming. In (purely) functional programming, everything is immutable by design – a certain variable only has a single definition at all times, as in mathematics. The .NET designers wisely followed the same principle when integrating the functional style into C#/.NET, despite it ultimately being a primarily imperative (hybrid?) language. Note: Though … Read more
What is new in .NET Framework 4.5 & What’s new and expected in .NET Framework 4.5: Support for Windows Runtime Support for Metro Style Applications Support for Async Programming Garbage Collector Improvements Faster ASP.NET Startup Better Data Access Support WebSockets Support Workflow Support – BCL Support differences in ASP.NET in these frameworks Compare What’s New … Read more
Google gives a hint pointing to CA1308: Normalize strings to uppercase It says: Strings should be normalized to uppercase. A small group of characters, when they are converted to lowercase, cannot make a round trip. To make a round trip means to convert the characters from one locale to another locale that represents character data … Read more
With Windows 10 x64, the setup is blocked by: HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\NET Framework Setup\NDP\v4\Full\Version HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\NET Framework Setup\NDP\v4\Client\Version Change both values temporarily to 4.0.30319 and the setup will let you continue. Make sure you edit the registry with elevated privileges, otherwise you will not be allowed to change the values.