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Console.WriteLine Method (String, Object, Object, Object, Object, ...)

Writes the text representation of the specified objects and variable-length parameter list, followed by the current line terminator, to the standard output stream using the specified format information.

This API is not CLS-compliant. The CLS-compliant alternative is WriteLine(String, Object[]).

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

C# does not support methods that use variable length arguments (varargs).
The compiler automatically resolves calls to this method to the same method that uses a parameter array.


Type: System.String
A composite format string (see Remarks).
Type: System.Object
The first object to write using format.
Type: System.Object
The second object to write using format.
Type: System.Object
The third object to write using format.
Type: System.Object
The fourth object to write using format.


An I/O error occurred.


format is null.


The format specification in format is invalid.

This method uses the composite formatting feature of the .NET Framework to convert the value of an object to its text representation and embed that representation in a string. The resulting string is written to the output stream.

The format parameter consists of zero or more runs of text intermixed with zero or more indexed placeholders, called format items, that correspond to an object in the parameter list of this method. The formatting process replaces each format item with the text representation of the value of the corresponding object.

The syntax of a format item is {index[,alignment][:formatString]}, which specifies a mandatory index, the optional length and alignment of the formatted text, and an optional string of format specifier characters that govern how the value of the corresponding object is formatted.

The .NET Framework provides extensive formatting support, which is described in greater detail in the following formatting topics.

For more information about the line terminator, see the Remarks section of the WriteLine method that takes no parameters.


The HostProtectionAttribute attribute applied to this type or member has the following Resources property value: UI. The HostProtectionAttribute does not affect desktop applications (which are typically started by double-clicking an icon, typing a command, or entering a URL in a browser). For more information, see the HostProtectionAttribute class or SQL Server Programming and Host Protection Attributes.

Notes to Callers

This method is marked with the vararg keyword, which means that it supports a variable number of parameters. The method can be called from Visual C++, but it cannot be called from C# or Visual Basic code. The C# and Visual Basic compilers resolve calls to WriteLine(String, Object, Object, Object, Object) as calls to WriteLine(String, Object[]).

The following example illustrates the use of variable arguments with the WriteLine(String, Object, Object, Object, Object) method. The method is called with a composite format string and five format items.

using namespace System;

void main()
   DateTime dateRecorded(2009, 6, 15);
   DateTime startTime(1, 1, 1, 0, 30, 0);
   TimeSpan interval(12, 0, 0);

   Double temperature1 = 52.8;
   Double temperature2 = 63.5;

   Console::WriteLine("Date: {0:d}:\n   Temperature at {1:t}: {2}\n   Temperature at {3:t}: {4}\n", 
                     dateRecorded, startTime, temperature1, 
                     startTime.Add(interval), temperature2);
// The example displays the following output:
//      Date: 6/15/2009:
//         Temperature at 12:30 AM: 52.8
//         Temperature at 12:30 PM: 63.5

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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