String Constructor (Char*, Int32, Int32)

Initializes a new instance of the String class to the value indicated by a specified pointer to an array of Unicode characters, a starting character position within that array, and a length.

This API is not CLS-compliant. 

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

[CLSCompliantAttribute(false)]
public String(
	char* value,
	int startIndex,
	int length
)

Parameters

value
Type: System.Char*
A pointer to an array of Unicode characters.
startIndex
Type: System.Int32
The starting position within value.
length
Type: System.Int32
The number of characters within value to use.

ExceptionCondition
ArgumentOutOfRangeException

startIndex or length is less than zero, value + startIndex cause a pointer overflow, or the current process does not have read access to all the addressed characters.

ArgumentException

value specifies an array that contains an invalid Unicode character, or value + startIndex specifies an address less than 64000.

If length is zero, an Empty instance is initialized.

This constructor copies Unicode characters from value, starting at startIndex and ending at (startIndex + length - 1).

If the specified range is outside of the memory allocated for the sequence of characters, the behavior of this constructor is system dependent. For example, such a situation might cause an access violation.

In C#, this constructor is defined only in the context of unsafe code.

NoteNote

   Calls to this constructor on systems using the Intel Itanium processor may throw a DataMisalignedException. If this occurs, call the String.String(Char[], Int32, Int32) constructor instead of this constructor.

.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

  • SecurityCriticalAttribute 

    requires full trust for the immediate caller. This member cannot be used by partially trusted or transparent code.

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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