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String::Concat Method (Object^, Object^)


Concatenates the string representations of two specified objects.

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

static String^ Concat(
	Object^ arg0,
	Object^ arg1


Type: System::Object^

The first object to concatenate.

Type: System::Object^

The second object to concatenate.

Return Value

Type: System::String^

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

The method concatenates arg0 and arg1by calling the parameterless ToString method of arg0 and arg1; it does not add any delimiters.

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

If either of the arguments is an array reference, the method concatenates a string representing that array, instead of its members (for example, "System.String[]").

The following example demonstrates the Concat method.

using namespace System;

int main()
   int i = -123;
   Object^ o = i;
   array<Object^>^objs = { -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 4.5
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
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