How Does One Compare Strings in C#

In the past, you had to call .ToString() on the strings when using the == or != operators to compare the strings’ values. That will still work, but the C# compiler now automatically compares the values instead of the references when the == or != operators are used on string types. If you actually do want to compare references, it can be done as follows: if ((object) str1 == (object) str2) { … } Here’s an example showing how string compares work,

using System;
public class StringTest {
    public static void Main(string[] args) {
        Object nullObj = null;
        Object realObj = new StringTest();
        int i = 10;
        Console.WriteLine(\”Null Object is[\”+nullObj + \”]\ n\” +
            \”Real Object is[\”+realObj + \”]\ n\” +
            \”i is[\”+i + \”]\ n\”);
        // Show string equality operators
        string str1 = \”foo\”;
        string str2 = \”bar\”;
        string str3 = \”bar\”;
        Console.WriteLine(\”{
            0
        } == {
            1
        } ? {
            2
        }\”, str1, str2, str1 == str2);
        Console.WriteLine(\”{
            0
        } == {
            1
        } ? {
            2
        }\”, str2, str3, str2 == str3);
    }
}
Output: Null Object is[]
Real Object is[StringTest]
i is[10]
foo == bar ? False
bar == bar ? True