StringBuilder Constructor (Int32, Int32)

Initializes a new instance of the StringBuilder class that starts with a specified capacity and can grow to a specified maximum.

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

public StringBuilder(
	int capacity,
	int maxCapacity
)

Parameters

capacity
Type: System.Int32

The suggested starting size of the StringBuilder.

maxCapacity
Type: System.Int32

The maximum number of characters the current string can contain.

ExceptionCondition
ArgumentOutOfRangeException

maxCapacity is less than one, capacity is less than zero, or capacity is greater than maxCapacity.

The capacity parameter defines the maximum number of characters that can be stored in the memory allocated by the current instance. Its value is assigned to the Capacity property. If the number of characters to be stored in the current instance exceeds this capacity value, the StringBuilder object allocates additional memory to store them.

If capacity is zero, the implementation-specific default capacity is used.

The maxCapacity property defines the maximum number of characters that the current instance can hold. Its value is assigned to the MaxCapacity property. If the number of characters to be stored in the current instance exceeds this maxCapacity value, the StringBuilder object does not allocate additional memory, but instead throws an exception.

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.

The following example demonstrates how to call the StringBuilder constructor with a specified capacity and maximum capacity.

int capacity = 255;
int maxCapacity = 1024;
StringBuilder stringBuilder = 
    new StringBuilder(capacity, maxCapacity);

.NET Framework

Supported in: 4.5.2, 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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