rspec/rules/S1905/csharp/rule.adoc

== Why is this an issue?

include::../description.adoc[]

=== Exceptions

Issues are not raised against the https://learn.microsoft.com/en-us/dotnet/csharp/programming-guide/types/casting-and-type-conversions[default literal].

== How to fix it

To fix your code remove the unnecessary casting expression.

=== Code examples

==== Noncompliant code example

[source,csharp,diff-id=1,diff-type=noncompliant]
----
public int Example(int i) 
{
    return (int) (i + 42); // Noncompliant
}

public IEnumerable<int> ExampleCollection(IEnumerable<int> coll) 
{
    return coll.Reverse().OfType<int>(); // Noncompliant
}
----

==== Compliant solution

[source,csharp,diff-id=1,diff-type=compliant]
----
public int Example(int i) 
{
    return i + 42;
}

public IEnumerable<int> ExampleCollection(IEnumerable<int> coll) 
{
    return coll.Reverse();
}
----

[source,csharp]
----
bool b = (bool)default; // Doesn't raise an issue
----

== Resources

=== Documentation
* Microsoft - https://learn.microsoft.com/en-us/dotnet/csharp/programming-guide/types/casting-and-type-conversions[Casting and type conversions]
* Wikipedia - https://en.wikipedia.org/wiki/Type_conversion[Type Conversion]
* Wikipedia - https://en.wikipedia.org/wiki/Strong_and_weak_typing[Strong and Weak Typing]
* Wikipedia - https://en.wikipedia.org/wiki/Polymorphism_(computer_science)[ Polymorphism (Computer Science)]

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== Implementation Specification
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include::../message.adoc[]

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== Comments And Links
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include::../comments-and-links.adoc[]

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