Using class members in functions

Your second sample

private void MyMethod(int MyVariable)
{
    MyVariable = 23;
}

makes no sense, MyVariable is an input parameter to the method not a variable member of the class. Your question is not very clear as to what you are trying to achieve. Most people nowadays use properties in C# to get and set variables, but there is no reason why you should not access them within a method of the class.

I mean like this...


class
{

private int _variable

private void MyMethod()
{
_variable = 23;
}

}


whithout having _variable as an argument in MyMethod like...

private void MyMethod(int MyVariable)
{
MyVariable = 23;
}