This documentation is archived and is not being maintained.

StringBuilder.Insert Method (Int32, String)

Inserts a string into this instance at the specified character position.

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

member Insert : 
        index:int * 
        value:string -> StringBuilder 


Type: System.Int32
The position in this instance where insertion begins.
Type: System.String
The string to insert.

Return Value

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


index is less than zero or greater than the current length of this instance.


The current length of this StringBuilder object plus the length of value exceeds MaxCapacity.

Existing characters are shifted to make room for the new text. The capacity is adjusted as needed.

This instance of StringBuilder is not changed if value is a null reference (Nothing in Visual Basic), or value is not a null reference (Nothing in Visual Basic) but its length is zero.

The following example demonstrates the Insert method.

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

.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

Portable Class Library

Supported in: Portable Class Library

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.