Concatenating strings

The + operator (discussed in Chapter 3, Introduction to C# Programming) is not the only way to perform string concatenation. The static method Concat of class string (Fig. 16.7) concatenates two strings and returns a new string containing the combined characters from both original strings. Line 16 appends the characters from string2 to the end of a copy of string1, using method Concat. The statement in line 16 does not modify the original strings.

Figure 16.7. Concat static method.

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 1 // Fig. 16.7: SubConcatenation.cs
 2 // Demonstrating string class Concat method.
 3 using System;
 4
 5 class StringConcatenation
 6 {
 7 public static void Main()
 8 {
 9 string string1 = "Happy ";
10 string string2 = "Birthday";
11
12 Console.WriteLine( "string1 = "" + string1 + ""
" +
13 "string2 = "" + string2 + """ );
14 Console.WriteLine(
15 "
Result of string.Concat( string1, string2 ) = " +
16 string.Concat( string1, string2 ) );
17 Console.WriteLine( "string1 after concatenation = " + string1 );
18 } // end method Main
19 } // end class StringConcatenation

 

string1 = "Happy "
string2 = "Birthday"

Result of string.Concat( string1, string2 ) = Happy Birthday
string1 after concatenation = Happy

Miscellaneous string Methods