The type '…' has no constructors defined

Question

I\'m noticing the compiler error The type \'...\' has no constructors defined generated when I erroneously attempt to instantiate a particlar class.

Answer 1

I've managed to reproduce this by:

• Creating a static class in a DLL
• Using ildasm to decompile it to IL
• Editing the IL to remove the "abstract" and "sealed" modifiers from the class
• Rebuilding the DLL with ilasm
• Compiling a program which tries to create an instance of the class

If you don't remove the abstract/sealed modifiers, the C# compiler recognizes it as a static class and gives a different error message. Of course, you could start off with a "normal" type and just remove the constructors, too.

EDIT: I actually thought I hadn't submitted this, as I saw the "internal" constructor one first. However, I'll leave it now as my version makes the C# compiler correct - there's a difference between a type having no accessible constructors and genuinely having no constructors :)