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What is unsafe code (code using pointers) in c#?

Manoj Bhatt 2316 11-Jan-2016
I'm interested how to use of unsafe code options in C#? And when?  Please give me appropriate answer. Thank you to all in advance.
c# c#  .net  performance  .net assembly 
Updated on 12-Jan-2016
Manoj Bhatt

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1 Answers

Anupam Mishra

Anupam Mishra

12-Jan-2016

The unsafe code or the unmanaged code is a code block that uses a pointer variable. A pointer is a variable whose value is the address of another variable i.e., the direct address of the memory location. Similar to any variable or constant, you must declare a pointer before you can use it to store any variable address.

If you are using Visual Studio IDE then you need to enable use of unsafe code in the project properties.

To do this:

·    Open project properties by double clicking the properties node in the Solution Explorer.

·    Click on the Build tab.

·    Select the option "Allow unsafe code".

What is unsafe code (code using pointers) in c#?

For example, 

using System;
namespace UnsafeCodeEx
{
    class TestPointer
    {
        public unsafe static void Main()
        {
            TestPointer p = new TestPointer();
            int var1 = 10;
            int var2 = 20;
            int* x = &var1;
            int* y = &var2;
            p.DemoMultiplication(x, y);
            Console.ReadKey();
        }
        public unsafe void DemoMultiplication(int* p, int* q)
        {
            int result = *p + *q;
             Console.WriteLine("Multiplication is: " + result);
        }
    }
}

Output:

What is unsafe code (code using pointers) in c#?

Similar way, you can write more program related to unsafe code .


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