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StringBuilderAppendFormat Method (String, Object)
Appends the string returned by processing a composite format string, which contains zero or more format items, to this instance. Each format item is replaced by the string representation of a corresponding argument in a parameter array.

Namespace: System.Text
Assembly: mscorlib (in mscorlib.dll) Version: 4.0.0.0
Syntax
C#
Copy
public StringBuilder AppendFormat(
	string format,
	params Object[] args
)

Parameters

format
Type: SystemString
A composite format string (see Remarks).
args
Type: SystemObject
An array of objects to format.

Return Value

Type: StringBuilder
A reference to this instance with format appended. Each format item in format is replaced by the string representation of the corresponding object argument.
Exceptions
ExceptionCondition
ArgumentNullExceptionformat or args is null.
FormatExceptionformat is invalid. -or-The index of a format item is less than 0 (zero), or greater than or equal to the length of the args array.
ArgumentOutOfRangeExceptionThe length of the expanded string would exceed MaxCapacity.
See Also