SA1128.md

SA1128

TypeName	SA1128ConstructorInitializerMustBeOnOwnLine
CheckId	SA1128
Category	Readability Rules

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

Cause

A constructor initializer is on the same line as the constructor declaration, within a C# code file.

Rule description

A violation of this rule occurs whenever the code contains a constructor initializer that is partially or completely on the same line as the constructor declaration.

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

public class TypeName
{
    public TypeName() : this(0)
    {
    }

    public TypeName(int value)
    {
    }
}

The : (colon) character is treated as part of the initializer and should be on the same line as the base or this keyword.

The following code would also produce a violation of this rule:

public class TypeName
{
	public TypeName() :
		base()
	{
	}
}

The following code would not produce any violations:

public class TypeName
{
    public TypeName()
        : this(0)
    {
    }

    public TypeName(int value)
    {
    }
}

How to fix violations

To fix a violation of this rule, move the constructor initializer, including the : character, to its own line.

How to suppress violations

public class TypeName
{
#pragma warning disable SA1128 // Constructor initializers should be on their own line
    public TypeName() : this(0)
#pragma warning restore SA1128 // Constructor initializers should be on their own line
    {
    }

    public TypeName(int value)
    {
    }
}