C#: Check if windows form

How can I check at runtime whether a C# application is a Windows application or a console application?

I want to write a generic output library (output to textbox or console when console app).

For that reason开发者_开发知识库, if I could check whether it is a asp application would be useful, too.

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I think you may be attacking the problem in the wrong way. Without knowing more about what you are doing here is what I'd suggest:

Create an interface called something like IOutputWriter with a Write(...) method. Then create an implementation for each environment (ConsoleOutputWriter, TextboxOutputWriter, etc...). Each environment can use the appropriate implementation since they know what type of app they are.