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<Type Name="ArgumentNullException" FullName="System.ArgumentNullException" FullNameSP="System_ArgumentNullException" Maintainer="ecma">
<TypeSignature Language="ILASM" Value=".class public serializable ArgumentNullException extends System.ArgumentException" />
<TypeSignature Language="C#" Value="public class ArgumentNullException : ArgumentException" />
<MemberOfLibrary>BCL</MemberOfLibrary>
<AssemblyInfo>
<AssemblyName>mscorlib</AssemblyName>
<AssemblyPublicKey>[00 00 00 00 00 00 00 00 04 00 00 00 00 00 00 00 ]</AssemblyPublicKey>
<AssemblyVersion>1.0.5000.0</AssemblyVersion>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
</AssemblyInfo>
<ThreadingSafetyStatement>All public static members of this type are safe for multithreaded operations. No instance members are guaranteed to be thread safe.</ThreadingSafetyStatement>
<Base>
<BaseTypeName>System.ArgumentException</BaseTypeName>
</Base>
<Interfaces />
<Docs>
<summary>
<para>Represents the error that occurs when an argument passed
to a method is invalid because it is <see langword="null" />
.</para>
</summary>
<remarks>
<block subset="none" type="note">
<para>
<see cref="T:System.ArgumentNullException" /> is thrown when a method is
invoked and at least one of the passed arguments is <see langword="null" /> and
should never be <see langword="null" />
.</para>
<para>
<see cref="T:System.ArgumentNullException" /> behaves identically to <see cref="T:System.ArgumentException" />. It is provided so that
application code can differentiate between exceptions caused by
<see langword="null" />
arguments and exceptions caused by non-null arguments. For errors caused by
non-null arguments, see <see cref="T:System.ArgumentOutOfRangeException" />
.</para>
</block>
</remarks>
<example>
<para>The following example demonstrates an error that causes
the <see cref="T:System.String" />
class to throw a <see cref="T:System.ArgumentNullException" /> exception.</para>
<code lang="C#">using System;
class ArgumentNullTest {
public static void Main() {
String[] s = null;
String sep = " ";
try {
String j = String.Join(sep,s);
}
catch (ArgumentNullException e) {
Console.WriteLine("Error: {0}",e);
}
}
}
</code>
<para>The output is</para>
<c>
<para>Error: System.ArgumentNullException: Value cannot be null.</para>
<para>Parameter name: value</para>
<para>at System.String.Join(String separator, String[] value)</para>
<para>at ArgumentNullTest.Main()</para>
</c>
</example>
</Docs>
<Members>
<Member MemberName=".ctor">
<MemberSignature Language="ILASM" Value="public rtspecialname specialname instance void .ctor()" />
<MemberSignature Language="C#" Value="public ArgumentNullException ();" />
<MemberType>Constructor</MemberType>
<ReturnValue />
<Parameters />
<Docs>
<summary>
<para>Constructs and initializes a new instance of the <see cref="T:System.ArgumentNullException" />
class.</para>
</summary>
<remarks>
<para>This constructor initializes the <see cref="!:System.ArgumentNullException.Message" /> property of the new instance to a
system-supplied message that describes the error, such as "Argument cannot be
null." This message takes into account the current system culture. The <see cref="!:System.ArgumentNullException.ParamName" /> property is initialized to <see langword="null" />
. </para>
</remarks>
</Docs>
<Excluded>0</Excluded>
<AssemblyInfo>
<AssemblyVersion>1.0.5000.0</AssemblyVersion>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
</AssemblyInfo>
</Member>
<Member MemberName=".ctor">
<MemberSignature Language="ILASM" Value="public rtspecialname specialname instance void .ctor(string paramName)" />
<MemberSignature Language="C#" Value="public ArgumentNullException (string paramName);" />
<MemberType>Constructor</MemberType>
<ReturnValue />
<Parameters>
<Parameter Name="paramName" Type="System.String" />
</Parameters>
<Docs>
<param name="paramName">A <see cref="T:System.String" /> that contains the name of the parameter that caused the exception. The content of <paramref name="paramName" /> is intended to be understood by humans.</param>
<summary>
<para>Constructs and initializes a new instance of the <see cref="T:System.ArgumentNullException" /> class.</para>
</summary>
<remarks>
<para>This constructor initializes the <see cref="!:System.ArgumentNullException.ParamName" /> property of the new instance using
<paramref name="paramName" /> . The <see cref="!:System.ArgumentNullException.Message" />
property is initialized to the system-supplied message provided by the
constructor that takes no arguments.</para>
</remarks>
</Docs>
<Excluded>0</Excluded>
<AssemblyInfo>
<AssemblyVersion>1.0.5000.0</AssemblyVersion>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
</AssemblyInfo>
</Member>
<Member MemberName=".ctor">
<MemberSignature Language="C#" Value="protected ArgumentNullException (System.Runtime.Serialization.SerializationInfo info, System.Runtime.Serialization.StreamingContext context);" />
<MemberType>Constructor</MemberType>
<Parameters>
<Parameter Name="info" Type="System.Runtime.Serialization.SerializationInfo" />
<Parameter Name="context" Type="System.Runtime.Serialization.StreamingContext" />
</Parameters>
<Docs>
<param name="info">To be added.</param>
<param name="context">To be added.</param>
<summary>To be added.</summary>
<remarks>To be added.</remarks>
</Docs>
<AssemblyInfo>
<AssemblyVersion>1.0.5000.0</AssemblyVersion>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
</AssemblyInfo>
</Member>
<Member MemberName=".ctor">
<MemberSignature Language="C#" Value="public ArgumentNullException (string message, Exception innerException);" />
<MemberType>Constructor</MemberType>
<Parameters>
<Parameter Name="message" Type="System.String" />
<Parameter Name="innerException" Type="System.Exception" />
</Parameters>
<Docs>
<param name="message">To be added.</param>
<param name="innerException">To be added.</param>
<summary>To be added.</summary>
<remarks>To be added.</remarks>
<since version=".NET 2.0" />
</Docs>
<AssemblyInfo>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
</AssemblyInfo>
</Member>
<Member MemberName=".ctor">
<MemberSignature Language="ILASM" Value="public rtspecialname specialname instance void .ctor(string paramName, string message)" />
<MemberSignature Language="C#" Value="public ArgumentNullException (string paramName, string message);" />
<MemberType>Constructor</MemberType>
<ReturnValue />
<Parameters>
<Parameter Name="paramName" Type="System.String" />
<Parameter Name="message" Type="System.String" />
</Parameters>
<Docs>
<param name="paramName">A <see cref="T:System.String" /> that contains the name of the parameter that caused the exception. The content of <paramref name="paramName" /> is intended to be understood by humans.</param>
<param name="message">A <see cref="T:System.String" /> that describes the error. The content of <paramref name="message" /> 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.</param>
<summary>
<para>Constructs and initializes a new instance of the <see cref="T:System.ArgumentNullException" />
class.</para>
</summary>
<remarks>
<para>This constructor initializes the <see cref="!:System.ArgumentNullException.ParamName" /> property of the new instance using <paramref name="paramName" />,
and the <see cref="!:System.ArgumentNullException.Message" /> property using <paramref name="message" />. If <paramref name="message" /> is <see langword="null" />,
the <see cref="!:System.ArgumentNullException.Message" /> property is initialized to the system-supplied message
provided by the constructor that takes no arguments.</para>
</remarks>
</Docs>
<Excluded>0</Excluded>
<AssemblyInfo>
<AssemblyVersion>1.0.5000.0</AssemblyVersion>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
</AssemblyInfo>
</Member>
</Members>
<TypeExcluded>0</TypeExcluded>
<Attributes>
<Attribute>
<AttributeName>System.Runtime.InteropServices.ComVisible(true)</AttributeName>
</Attribute>
</Attributes>
</Type>
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