C# Multiple String Comparision with Same Value

Question

Please have a look at the below case, surely that will be interesting..

if i want to assign same value to multiple objects i will use something like this

string1 = string2 = string3 = string 4 = "some string";

Now what i want to do is, i want to compare string1, string2, string3 and string4 with "someotherstring"... questions is is there any way to do this without writing individual comparision. i.e.

string1 == "someotherstring" || string2 == "someotherstring" || string3 == "someotherstring" || string4 == "someotherstring"

Hope i was able to explain the question.. kindly provide me help on this.

Regards, Paresh Rathod

Answer 1

In C# 3.0, you can write a very trivial extension method:

public static class StringExtensions
{
    public static bool In(this string @this, params string[] strings)
    {
        return strings.Contains(@this); 
    }
}

Then use it like this:

if ("some string".In(string1, string2, string3, string4))
{
    // Do something
}

Answer 2

For your case you can try something like this

if (new string[] { string1, string2, string3, string4 }.Contains("someotherstring"))
{
}