Ignore "Expression value not used" for fluent interfaces

This diagnostic suppressor allows you to specify a list of types for which method return values can be ignored.

This is particularly useful for "fluent interfaces," such as System.Text.StringBuilder, where the return values are just the current instance. However, IDE0058 ("Expression value not used") would be reported on such types, even though "using" (i.e. storing) the value was useless. This suppressor was created for this type of situations

Usage

First, add the package to your .csproj file:

  <ItemGroup>
    <PackageReference Include="Blokyk.Roslyn.ValueNotUsedSuppressor" Version="*" />
  </ItemGroup>

Once the package restored, you can configure the types affected by this suppressor by adding the dotnet_fluent_types key to your .editorconfig file and then specifying a comma-separated list of (fully-qualified metadata) type names.

For example, if you had an interface FluentRecord<T> inside the namespace MyStuff.Utils, you'd add :

dotnet_fluent_types = System.Text.StringBuilder, MyStuff.Utils.FluentRecord`1

The default value for dotnet_fluent_types is currently System.Text.StringBuilder.