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Strings.Replace Method

Returns a string in which a specified substring has been replaced with another substring a specified number of times.

Namespace:  Microsoft.VisualBasic
Assembly:  Microsoft.VisualBasic (in Microsoft.VisualBasic.dll)

static member Replace : 
        Expression:string * 
        Find:string * 
        Replacement:string * 
        Start:int * 
        Count:int * 
        Compare:CompareMethod -> string 


Type: System.String
Required. String expression containing substring to replace.
Type: System.String
Required. Substring being searched for.
Type: System.String
Required. Replacement substring.
Type: System.Int32
Optional. Position within Expression that starts a substring used for replacement. The return value of Replace is a string that begins at Start, with appropriate substitutions. If omitted, 1 is assumed.
Type: System.Int32
Optional. Number of substring substitutions to perform. If omitted, the default value is –1, which means "make all possible substitutions."
Type: Microsoft.VisualBasic.CompareMethod
Optional. Numeric value indicating the kind of comparison to use when evaluating substrings. See Settings for values.

Return Value

Type: System.String
Replace returns the following values.


Replace returns

Find is zero-length or Nothing

Copy of Expression

Replace is zero-length

Copy of Expression with no occurrences of Find

Expression is zero-length or Nothing, or Start is greater than length of Expression


Count is 0

Copy of Expression


Count < -1 or Start <= 0.

The return value of the Replace function is a string that begins at the position specified by Start and concludes at the end of the Expression string, with the substitutions made as specified by the Find and Replace values.

The Compare argument can have the following values.




Performs a binary comparison


Performs a textual comparison

This example demonstrates the Replace function.

Dim TestString As String = "Shopping List"
' Returns "Shipping List".
Dim aString As String = Replace(TestString, "o", "i")

.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

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.