Java vs. C#

Pointer

Java
 
There is no pointer concept in Java

int i = 5;
int p;
p = i; 
p = 10;
System.out.print(i);//5

C#
 
Using pointer in C# is not safe.

unsafe
{
    int i = 5;
    int *p;
    p = &i; 
    *p = 10;
    System.Console.Write(i);//10
}