Use '==' to compare two string objects : String Compare « String « C# / CSharp Tutorial

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C# / CSharp Tutorial » String » String Compare 
5.10.2.Use '==' to compare two string objects
using System;

class MainClass
{
    public static void Main()
    {
        string test1 = "This is a test string";
        string test2, test3;

        test2 = test1.Insert(15"AAA ");
        test3 = test1.ToUpper();

       Console.WriteLine("test1: '{0}'", test1);
        Console.WriteLine("test2: '{0}'", test2);
        Console.WriteLine("test3: '{0}'", test3);

        if (test1 == test3)
            Console.WriteLine("test1 is equal to test3");
        else
            Console.WriteLine("test1 is not equal to test3");
       
    }
}
test1: 'This is a test string'
test2: 'This is a test AAA string'
test3: 'THIS IS A TEST STRING'
test1 is not equal to test3
5.10.String Compare
5.10.1.String comparisons: ignore case
5.10.2.Use '==' to compare two string objects
5.10.3.Compare for equal
5.10.4.Compare string: equal, less than or greater than
5.10.5.If two string are equal
5.10.6.Compare string case sensitively
5.10.7.Compare string with start index and end index
5.10.8.Compare string with String.Compare(string str1, strng str2)
5.10.9.Compare strings using StringComparison enumeration: InvariantCulture
5.10.10.String Interning
5.10.11.String equality
5.10.12.Sample for String.Equals(Object), String.Equals(String), String.Equals(String, String)
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