C＃threading - resetThread是一个'变量'但是像'方法'一样使用

I'm trying to create a thread to reset the button colours in an application I'm writing, but whenever I try to create the Thread object, I get the error 'resetThread is a 'variable' but is used like a 'method'. This is the code I'm using to create the thread object:I'm trying to create a thread to reset the butt