SuppressMessageAttribute Class

Definition

Namespace:

System.Diagnostics.CodeAnalysis

Assembly:

System.Runtime.dll

Source:

SuppressMessageAttribute.cs

Suppresses reporting of a specific code analysis rule violation, allowing multiple suppressions on a single code artifact. Does not apply to compiler diagnostics.

public ref class SuppressMessageAttribute sealed : Attribute

[System.AttributeUsage(System.AttributeTargets.All, AllowMultiple=true, Inherited=false)]
[System.Diagnostics.Conditional("CODE_ANALYSIS")]
public sealed class SuppressMessageAttribute : Attribute

[<System.AttributeUsage(System.AttributeTargets.All, AllowMultiple=true, Inherited=false)>]
[<System.Diagnostics.Conditional("CODE_ANALYSIS")>]
type SuppressMessageAttribute = class
    inherit Attribute

Public NotInheritable Class SuppressMessageAttribute
Inherits Attribute

Inheritance

Object

Attribute

SuppressMessageAttribute

Attributes

AttributeUsageAttribute ConditionalAttribute

Examples

The following code example shows the use of the SuppressMessageAttribute attribute to suppress performance warning messages.

#define CODE_ANALYSIS
using System;
using System.Diagnostics.CodeAnalysis;

namespace CodeAnalysisSample
{
    class Library
    {
        [SuppressMessage("Microsoft.Performance", "CA1801:ReviewUnusedParameters", MessageId = "isChecked")]
        [SuppressMessage("Microsoft.Performance", "CA1804:RemoveUnusedLocals", MessageId = "fileIdentifier")]
        static void FileNode(string name, bool isChecked)
        {
            string fileIdentifier = name;
            string fileName = name;
            string version = String.Empty;
        }
    }
}

#Const CODE_ANALYSIS = True
Imports System.Diagnostics.CodeAnalysis



Class Library
    
    <SuppressMessage("Microsoft.Performance", "CA1801:ReviewUnusedParameters", MessageId:="isChecked"), _
     SuppressMessage("Microsoft.Performance", "CA1804:RemoveUnusedLocals", MessageId:="fileIdentifier")> _
    Shared Sub FileNode(ByVal name As String, ByVal isChecked As Boolean)
        Dim fileIdentifier As String = name
        Dim fileName As String = name
        Dim version As String = String.Empty

    End Sub
End Class

Remarks

This attribute can be applied to any application element. For a complete list of the violations that can be suppressed, see Code quality rules.

Note

The ConditionalAttribute is applied to this class, specifying the preprocessing symbol "CODE_ANALYSIS" as the conditional symbol that determines whether the attribute call is included or omitted. If the symbol is defined, the attribute call is included; otherwise, the call is omitted.

When you right-click a code analysis warning in Visual Studio and choose Suppress <rule-ID> > in Suppression File or Suppress <rule-ID> > in Source (attribute), a SuppressMessage attribute is added to either the global suppressions file or to the source code file. For more information about the SuppressMessage attribute and its use in Visual Studio, see Suppress code analysis violations.

Constructors

SuppressMessageAttribute(String, String)

Initializes a new instance of the SuppressMessageAttribute class, specifying the category of the code analysis tool and the identifier for an analysis rule.

Properties

Category	Gets the category identifying the classification of the attribute.
CheckId	Gets the identifier of the code analysis tool rule to be suppressed.
Justification	Gets or sets the justification for suppressing the code analysis message.
MessageId	Gets or sets the expanded exclusion criteria.
Scope	Gets or sets the scope of the code that is relevant for the attribute.
Target	Gets or sets a fully qualified path that represents the code analysis target.
TypeId	When implemented in a derived class, gets a unique identifier for this Attribute. (Inherited from Attribute)

Methods

Equals(Object)	Returns a value that indicates whether this instance is equal to a specified object. (Inherited from Attribute)
GetHashCode()	Returns the hash code for this instance. (Inherited from Attribute)
GetType()	Gets the Type of the current instance. (Inherited from Object)
IsDefaultAttribute()	When overridden in a derived class, indicates whether the value of this instance is the default value for the derived class. (Inherited from Attribute)
Match(Object)	When overridden in a derived class, returns a value that indicates whether this instance equals a specified object. (Inherited from Attribute)
MemberwiseClone()	Creates a shallow copy of the current Object. (Inherited from Object)
ToString()	Returns a string that represents the current object. (Inherited from Object)