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/**

* @name Redundant ToString() call

* @description Explicit calls to `ToString()` can be removed when the call

* appears in a context where an implicit conversion exists.

* @kind problem

* @problem.severity recommendation

* @precision high

* @id cs/useless-tostring-call

* @tags maintainability

* useless-code

*/

import csharp

import semmle.code.csharp.commons.Strings

import semmle.code.csharp.frameworks.System

from MethodCall mc

where

mc instanceof ImplicitToStringExpr and

mc.getTarget() instanceof ToStringMethod

select mc, "Redundant call to 'ToString'."