Uses Of Params Modifier In C#

While using the function member, any numbers of parameter (including none) may appear in the calling function based on need. So to have a flexible function we can use params modifier while writing the definition of functions.

The params keyword specify a method parameter that takes an argument where the numbers of arguments become variable means parameter arrays allow a variable numbers of arguments to be passed in to a function. It is also type compatible with the parameters. For example we can send integers , characters, strings at a time to the function which has the params modifier declared.

In addition to that, a single array can be passed in which parameter acts just as normal value parameter with the type matches as of the function.
For Example

private void ParamsUsed()
        {
            ArrayList   listForObject = new ArrayList();
            ArrayList   listForInt = new ArrayList();

            int[] myarray = new int[] { 10, 11, 12 ,13, 14, 15, 16 };
            
            listForObject = UseParams2(100, 200, 'A', "amit");
            listForInt = UseParams(myarray);

            DropDownList1.DataSource = listForObject;
            DropDownList1.DataBind();

            DropDownList2.DataSource = listForInt;
            DropDownList2.DataBind();

        }

public static ArrayList UseParams2(params object[] list)
        {
            ArrayList listT = new ArrayList();
            for (int i = 0; i < list.Length; i++)
            {
                listT.Add(list[i]);
            }
            return listT;
         
        }

public static ArrayList UseParams(params int[] list)
        {
            ArrayList listT = new ArrayList();
            for (int i = 0; i < list.Length; i++)
            {
                listT.Add(list[i]);
            }
            return listT;
        }