StringBuilder Constructor (String, Int32, Int32, Int32)

Initializes a new instance of the StringBuilder class from the specified substring and capacity.

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

public StringBuilder(
	string value,
	int startIndex,
	int length,
	int capacity


Type: System.String
The string that contains the substring used to initialize the value of this instance. If value is null, the new StringBuilder will contain the empty string (that is, it contains Empty).
Type: System.Int32
The position within value where the substring begins.
Type: System.Int32
The number of characters in the substring.
Type: System.Int32
The suggested starting size of the StringBuilder.


capacity is less than zero.


startIndex plus length is not a position within value.

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

The following code example demonstrates how to call the StringBuilder constructor with the specified string.

string initialString = "Initial string for stringbuilder.";
int startIndex = 0;
int substringLength = 14;
int capacity = 255;
StringBuilder stringBuilder = new StringBuilder(initialString,
    startIndex, substringLength, capacity);


Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.