hello i want to check if richtextbox1.text start with "http://www.debugging.com" or not how can i do that

I'm trying to compile some code that will check if a date from a datetimepicker and text from a textbox match exisisting entries in a datagridview if so throw a message window. Example: on my form i have dateTimePicker1 and resIndexTe ...

I want to do something like this: (1) Check for existence of file with certain extension ".txt" in a directory D:\test (2) If a file does not exist, create a initial one, write something to it, and name it test_1.txt (2) If a ...

Guys, is it possible to check if a network connection has been established then if so perform a function? Something like below (which doesn't work) but i want to check if the local network exists not the internet. [code][DllImport(" ...