将表达式作为参数传递给方法

Question

I am trying to pass an expression as parameter to a function like:

public string MyFunction(bool expression) //what should I set here as parameter type?
{
    return expression ? "True" : "False";
}

public void InvokeMyFunction()
{
    var myString = MyFunction(10 > 1);
}

Answer 1

You can pass Func<bool> to represent a method that returns a boolean. Also when you declare the function, you can use lambda syntax () => to represent an anonymous method.

string MyFunction(Func<bool> expression)
{
    return expression() ? "True" : "False";
}

void InvokeMyFunction()
{
    var myString = MyFunction(() => 10 > 1);
}