Structs in C#

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The struct type is suitable for representing lightweight objects such as Point, Rectangle, and Color.

public struct CoOrds
{
 public int x, y;

 public CoOrds(int p1, int p2)
    {
        x = p1;
        y = p2;
    }
}

Here are two examples of how to create and use structs.

Example 1.

This example demonstrates struct initialization using both default and parameterized constructors.

Here is structure definition:

public struct CoOrds
{
 public int x, y;

 public CoOrds(int p1, int p2)
    {
        x = p1;
        y = p2;
    }
}

This is how you use the struct defined earlier.

// Declare and initialize struct objects.
class TestCoOrds
{
 static void Main()
    {
 // Initialize:   
        CoOrds coords1 = new CoOrds();
        CoOrds coords2 = new CoOrds(10, 10);

 // Display results:
        Console.Write("CoOrds 1: ");
        Console.WriteLine("x = {0}, y = {1}", coords1.x, coords1.y);

        Console.Write("CoOrds 2: ");
        Console.WriteLine("x = {0}, y = {1}", coords2.x, coords2.y);

 // Keep the console window open in debug mode.
        Console.WriteLine("Press any key to exit.");
        Console.ReadKey();
    }
}
/* Output:
    CoOrds 1: x = 0, y = 0
    CoOrds 2: x = 10, y = 10
*/

Example 2

This example demonstrates a feature that is unique to structs. It creates a CoOrds object without using the new operator. If you replace the word struct with the word class, the program will not compile.

Here is the struct definition.

public struct CoOrds
{
 public int x, y;

 public CoOrds(int p1, int p2)
    {
        x = p1;
        y = p2;
    }
}

This is how you use the struct defined earlier.

// Declare a struct object without "new."
class TestCoOrdsNoNew
{
 static void Main()
    {
 // Declare an object:
        CoOrds coords1;

 // Initialize:
        coords1.x = 10;
        coords1.y = 20;

 // Display results:
        Console.Write("CoOrds 1: ");
        Console.WriteLine("x = {0}, y = {1}", coords1.x, coords1.y);

 // Keep the console window open in debug mode.
        Console.WriteLine("Press any key to exit.");
        Console.ReadKey();
    }
}
// Output: CoOrds 1: x = 10, y = 20