SA1005: Single line comments should begin with single space

Cause

A single-line comment within a C# code file does not begin with a single space.

Rule description

A violation of this rule occurs when a single-line comment does not begin with a single space. For example:

private void Method1()
{
    //A single-line comment.
    //   A single-line comment.
}

The comments should begin with a single space after the leading forward slashes:

private void Method1()
{
    // A single-line comment.
    // A single-line comment.
}

An exception to this rule occurs when the comment is being used to comment out a line of code. In this case, the space can be omitted if the comment begins with four forward slashes to indicate out-commented code. For example:

private void Method1()
{
    ////int x = 2;
    ////return x;
}

This rule also does not report comments that begin with two or more dashes (//--), a backslash (//\), or a .NET template engine processing directive (//-:cnd or //+:cnd, as in //-:cnd:noEmit).

How to fix violations

To fix a violation of this rule, ensure that the comment begins with a single space. If the comment is being used to comment out a line of code, ensure that the comment begins with four forward slashes, in which case the leading space can be omitted.

How to suppress violations

[SuppressMessage("StyleCop.CSharp.SpacingRules", "SA1005:SingleLineCommentsMustBeginWithSingleSpace", Justification = "Reviewed.")]

#pragma warning disable SA1005 // SingleLineCommentsMustBeginWithSingleSpace
#pragma warning restore SA1005 // SingleLineCommentsMustBeginWithSingleSpace