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String.Concat Method (Object, Object)
Concatenates the string representations of two specified objects.
Assembly: mscorlib (in mscorlib.dll)
Parameters
- arg0
- Type: System.Object
The first object to concatenate.
- arg1
- Type: System.Object
The second object to concatenate.
Return Value
Type: System.StringThe 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 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
Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
