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What is a reference/ref parameter of an array type in C#?
Declare the reference parameters using the ref keyword. A reference parameter is a reference to a memory location of a variable. When you pass parameters by reference, unlike value parameters, a new storage location is not created for these parameters.
Declare a ref parameter −
public void swap(ref int x, ref int y) {}Declare a ref parameter of array type −
static void Display(ref int[] myArr)
The following is an example showing how to work with ref parameter of an array type in C# −
class TestRef {
static void Display(ref int[] myArr) {
if (myArr == null) {
myArr = new int[10];
}
myArr[0] = 345;
myArr[1] = 755;
myArr[2] = 231;
}
static void Main() {
int[] arr = { 98, 12, 65, 45, 90, 34, 77 };
Display(ref arr);
for (int i = 0; i < arr.Length; i++) {
System.Console.Write(arr[i] + " ");
}
System.Console.ReadKey();
}
}
Updated on: 21-Jun-2020
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