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Static Code Analysis
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CRR0001 - Redundant sub-expressions in a binary operation
CRR0002 - Suspect variable reference in a For-loop condition
CRR0003 - Suspect variable reference in the For-loop iterator section
CRR0004 - Ternary expression has identical branches
CRR0005 - Expression value is always the same
CRR0006 - Suspect variable reference in null-check following as-cast
CRR0007 - String format item/argument mismatch
CRR0008 - If-block matches else-block
CRR0009 - Subsequent if-statements have identical conditions
CRR0010 - Exception without throw
CRR0011 - Next if-statement has an identical condition that will never be reached
CRR0012 - Logical OR expression has opposite operands
CRR0015 - Logical OR expression redundancy
CRR0016 - Method call's return value is ignored
CRR0017 - Null check follows usage
CRR0018 - Suspect assignment reversal
CRR0019 - Expression contains redundant subsets
CRR0020 - Integral divide operation cast to float
CRR0021 - Subsequent else-if conditions are identical
CRR0022 - Unreachable conditional code block (a similar condition in the else branch)
CRR0023 - Unnecessary conditional
CRR0024 - Increase precision with a built-in constant or call
CRR0025 - Unreachable conditional code block (the inversed condition is already satisfied)
CRR0026 - Unused member
CRR0028 - Empty event handler
CRR0029 - The ConfigureAwait(true) is called implicitly
CRR0030 - Redundant 'await'
CRR0031 - The returned Task is null
CRR0033 - The void async method should be in a try/catch block
CRR0035 - No CancellationToken parameter in the async method
CRR0036 - The 'await Task.FromResult()' expression is redundant
CRR0037 - Task.Wait is used in an async method
CRR0038 - The CancellationToken parameter is never used
CRR0039 - The 'await' expression without cancellation token
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Docs CodeRush Static Code Analysis Analyzers Library CRR0038 - The CancellationToken parameter is never used

CRR0038 - The CancellationToken parameter is never used

This analyzer detects asynchronous methods that do not use the passed CancellationToken.

Task<string> DemoMethodAsync(CancellationToken token) {
    DoThings();
    return Task.FromResult("Success");
}

All asynchronous methods should accept the CancellationToken parameter and use it to cancel a task if task cancellation was requested. Refer to the Task Cancellation article for more information.

Task<string> DemoMethodAsync(CancellationToken token) {
    token.ThrowIfCancellationRequested();
    DoThings(token);
    return Task.FromResult("Success");
}