C Sharp Programming/Keywords/unsafe

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The unsafe keyword may be used to modify a procedure or define a block of code which uses unsafe code. Code is unsafe if it uses the "address of" operator(&) or if it uses a pointer operator (*).

In order for the compiler to compile code containing this keyword, you must use the /unsafe option when using the Microsoft C-Sharp Compiler.

// example of unsafe to modify a procedure
class MyClass {
  unsafe static void(string *msg) {
    Console.WriteLine(*msg)
  }
}
 
// example of unsafe to modify a code block
string s = "hello";
unsafe {
  char *cp = &s[2];
  *cp = 'a';
}