By 22/07/2015 6 Comments

C# Concatenation Operator

  • It is denoted by a + plus sign and can be called concatenation operator.
  • It is used to join or connect one string value with another string or multiple strings each other.
  • It is also used to join a non-string value with a string value.
  • It is performed at compile time by C# compiler.
  • The concatenation (+) operator is converted into string.Concat method at compile time.


using System;
namespace csharpBasic
  // Start class definition / declaration.
    class Program
      // Static main method void type declaration.
        static void Main(string[] args)
            // Declare two string type variables.
            string technologyName, designPattern;

            // Initialize string variables with different values.
            technologyName = "C# .NET is an ";
            designPattern = "Object oriented programing language.";

            // Print string variables. 
            Console.WriteLine(technologyName + designPattern);

            // Declare and initialize pi variable with 3.14 value.
            double pi = 3.14;

            // Print pi value.
            Console.WriteLine("In mathematics the value of Pi is " + pi);

        } // End of main method definition.

    } // End of class.


  • Concatenation operator (+) can be applied on any data type.
  • It joins strings to any data type.

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Posted in: C# Basics, C#.NET

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