ArgumentException Constructor (String, String)

ArgumentException Constructor (String, String)


Initializes a new instance of the ArgumentException class with a specified error message and the name of the parameter that causes this exception.

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

public ArgumentException(
	string message,
	string paramName


Type: System.String

The error message that explains the reason for the exception.

Type: System.String

The name of the parameter that caused the current exception.

This constructor initializes the Message property of the new instance using the value of the message parameter. The content of the message parameter is intended to be understood by humans. The caller of this constructor is required to ensure that this string has been localized for the current system culture.

This constructor initializes the ParamName property of the new instance using paramName. The content of paramName is intended to be understood by humans.

The following table shows the initial property values for an instance of ArgumentException.




The error message string.


The parameter name string.

The following code example demonstrates how to call the ArgumentException constructor. This code example is part of a larger example provided for the ArgumentException class.

static int DivideByTwo(int num) 
    // If num is an odd number, throw an ArgumentException.
    if ((num & 1) == 1)
        throw new ArgumentException("Number must be even", "num");

    // num is even, return half of its value.
    return num / 2;

Universal Windows Platform
Available since 4.5
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
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