C#

string x="aha";

for (...) {
   string y=x;
}

public void Inside() {
    for (int i = 0; i < 1000; i++) {
        int x = i;
    }
}

public void Outside() {
    int x;
    for (int i = 0; i < 1000; i++) {
        x = i;
    }
}

public void Outside() {
    int num1;
    int num2;
    for (num2 = 0; (num2 < 1000); num2 = (num2 + 1)) {
        num1 = num2;
    }
}

long timeIn = 0;<br />
long timeOut = 0;<br />
<br />
long l = System.DateTime.Now.Ticks;<br />
for (long x = 0; x < 10000000000; x++)<br />
{<br />
    int i = 1;<br />
    i++;<br />
}<br />
timeIn = System.DateTime.Now.Ticks - l;<br />
<br />
l = System.DateTime.Now.Ticks;<br />
int i2;<br />
for (long x = 0; x < 10000000000; x++)<br />
{<br />
    i2 = 1;<br />
    i2++;<br />
}<br />
timeOut = System.DateTime.Now.Ticks - l;<br />
<br />
MessageBox.Show("Time In: " + timeIn.ToString() + Environment.NewLine + "Time Out: " + timeOut.ToString());<br />

• P/Invoke[^]: allows you to call exported C functions (not C++ class member functions).
• C++/CLI like I just mentioned
• COM interop: if the C++ dll compiles into a COM object, you can use it easily from C# by simply adding a reference to the COM object like you would a normal .NET control.

Justin Perez wrote:

Why do you need to set it to null, why will false not suffice?