WriteLine Method (String, Object)

Console.WriteLine Method (String, Object)


Writes the text representation of the specified object, followed by the current line terminator, to the standard output stream using the specified format information.

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

[<HostProtectionAttribute(SecurityAction.LinkDemand, UI = true)>]
static member WriteLine : 
        format:string *
        arg0:Object -> unit


Type: System.String

A composite format string (see Remarks).

Type: System.Object

An object to write using format.

Exception Condition

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 following example demonstrates the standard formatting specifiers for numbers, dates, and enumerations.

No code example is currently available or this language may not be supported.

The following example illustrates the use of the WriteLine method. It assumes that the amount of a restaurant bill is passed to the example as a command-line argument.

No code example is currently available or this language may not be supported.


for modifying safe top-level windows and subwindows. Associated enumeration: UIPermissionWindow.SafeTopLevelWindows

.NET Framework
Available since 1.1
Available since 2.0
Windows Phone Silverlight
Available since 7.0
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