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StringBuilder.Append Method (Int64)

Appends the string representation of a specified 64-bit signed integer to this instance.

Namespace:  System.Text
Assembly:  mscorlib (in mscorlib.dll)
public StringBuilder Append(
	long value
)

Parameters

value
Type: System.Int64

The value to append.

Return Value

Type: System.Text.StringBuilder
A reference to this instance after the append operation has completed.
ExceptionCondition
ArgumentOutOfRangeException

Enlarging the value of this instance would exceed MaxCapacity.

The Append(Int64) method modifies the existing instance of this class; it does not return a new class instance. Because of this, you can call a method or property on the existing reference and you do not have to assign the return value to a StringBuilder object, as the following example illustrates.

System.Text.StringBuilder sb = new 
            System.Text.StringBuilder("The range of a 64-bit integer: ");
sb.Append(Int64.MinValue).Append(" to ").Append(Int64.MaxValue);
Console.WriteLine(sb);
// The example displays the following output: 
//       The range of a 64-bit integer:  -9223372036854775808 to 9223372036854775807

The Append(Int64) method calls the Int64.ToString(IFormatProvider) to get the string representation of value for the current culture. To control the formatting of value, call the AppendFormat method.

The capacity of this instance is adjusted as needed.

Notes to Callers

In the .NET Framework 4 and the .NET Framework 4.5, when you instantiate the StringBuilder object by calling the StringBuilder(Int32, Int32) constructor, both the length and the capacity of the StringBuilder instance can grow beyond the value of its MaxCapacity property. This can occur particularly when you call the Append and AppendFormat methods to append small strings.

.NET Framework

Supported in: 4.5.1, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone 8, Silverlight 8.1

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, 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.

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