Remove unnecessary cast (IDE0004)

Property	Value
Rule ID	IDE0004
Title	Remove unnecessary cast
Category	Style
Subcategory	Unnecessary code rules (expression-level preferences)
Applicable languages	C# and Visual Basic

Overview

This rule flags unnecessary type casts. A cast expression is unnecessary if the code semantics would be identical with or without it.

This rule has no associated code-style options.

// Code with violations
int v = (int)0;

// Fixed code
int v = 0;

' Code with violations
Dim v As Integer = CType(0, Integer)

' Fixed code
Dim v As Integer = 0

If you want to suppress only a single violation, add preprocessor directives to your source file to disable and then re-enable the rule.

#pragma warning disable IDE0004
// The code that's violating the rule is on this line.
#pragma warning restore IDE0004

To disable the rule for a file, folder, or project, set its severity to none in the configuration file.

[*.{cs,vb}]
dotnet_diagnostic.IDE0004.severity = none

To disable all of the code-style rules, set the severity for the category Style to none in the configuration file.

[*.{cs,vb}]
dotnet_analyzer_diagnostic.category-Style.severity = none