SA1135.md

SA1135

TypeName	SA1135UsingDirectivesMustBeQualified
CheckId	SA1135
Category	Readability Rules

:memo: This rule is new for StyleCop Analyzers, and was not present in StyleCop Classic.

Cause

A using directive is not qualified.

Rule description

A violation of this rule occurs when a using directive is contained within a namespace and is not qualified. Note that alias definitions of classes within the same namespace do not need to be qualified.

For example, the following code would produce a violation of this rule:

namespace System.Threading
{
    using IO;
    using Tasks;
}

The following code would not produce any violations:

namespace System.Threading
{
    using System.IO;
    using System.Threading.Tasks;

    using T = Thread;
}

How to fix violations

To fix a violation of this rule, use the full qualified namespace name.

How to suppress violations

namespace N1.N2
{
#pragma warning disable SA1135 // Using directives must be qualified
    using N3;
#pragma warning restore SA1135 // Using directives must be qualified
}