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String.Concat Method (Object, Object, Object)

.NET Framework (current version)

Other Versions

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Concatenates the string representations of three specified objects.

Namespace: System
Assembly: mscorlib (in mscorlib.dll)

Syntax

C++

public static string Concat(
	object arg0,
	object arg1,
	object arg2
)

Parameters

arg0: Type: System.Object
The first object to concatenate.

arg1: Type: System.Object
The second object to concatenate.

arg2: Type: System.Object
The third object to concatenate.

Return Value

Type: System.String

The concatenated string representations of the values of arg0, arg1, and arg2.

Remarks

The method concatenates arg0, arg1, and arg2 by calling the parameterless ToString method of each object; it does not add any delimiters.

String.Empty is used in place of any null argument.

Examples

The following example demonstrates the Concat method.

C++

using System;

class stringConcat5 {
    public static void Main() {
    int i = -123;
    Object o = i;
    Object[] objs = new Object[] {-123, -456, -789};

    Console.WriteLine("Concatenate 1, 2, and 3 objects:");
    Console.WriteLine("1) {0}", String.Concat(o));
    Console.WriteLine("2) {0}", String.Concat(o, o));
    Console.WriteLine("3) {0}", String.Concat(o, o, o));

    Console.WriteLine("\nConcatenate 4 objects and a variable length parameter list:");
    Console.WriteLine("4) {0}", String.Concat(o, o, o, o));
    Console.WriteLine("5) {0}", String.Concat(o, o, o, o, o));

    Console.WriteLine("\nConcatenate a 3-element object array:");
    Console.WriteLine("6) {0}", String.Concat(objs));
    }
}
// The example displays the following output:
//    Concatenate 1, 2, and 3 objects:
//    1) -123
//    2) -123-123
//    3) -123-123-123
//    
//    Concatenate 4 objects and a variable length parameter list:
//    4) -123-123-123-123
//    5) -123-123-123-123-123
//    
//    Concatenate a 3-element object array:
//    6) -123-456-789

Universal Windows Platform
Available since 8
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1