C# String Equals() Method

The Equals() method in C# is used to compare two strings for equality. It returns a Boolean value indicating whether the two strings have the same value or not.

The syntax of the Equals() method is as follows:

string1.Equals(string2);

Here, string1 is the first string to be compared, and string2 is the second string to be compared. The Equals() method returns true if string1 and string2 have the same value; otherwise, it returns false.

It's important to note that the Equals() method is case-sensitive. That means if the two strings have the same characters but different cases, the method will return false. To perform a case-insensitive comparison, you can use the Equals() method with the StringComparison.OrdinalIgnoreCase parameter:

string1.Equals(string2, StringComparison.OrdinalIgnoreCase);

This will compare the two strings without considering their case.

You can also use the == operator to compare strings for equality in C#. This operator performs a case-sensitive comparison by default. Here's an example:

string str1 = "hello";
string str2 = "HELLO";
bool isEqual = str1.Equals(str2, StringComparison.OrdinalIgnoreCase);
Console.WriteLine(isEqual);  // Output: true

In this example, the Equals() method is used with the StringComparison.OrdinalIgnoreCase parameter to perform a case-insensitive comparison. The isEqual variable will be true because the two strings have the same value when case is ignored.