Uses IL weaving (via http://www.mono-project.com/Cecil) to add support for static mixins to .net languages

• No references required
• No base class required
• Supports .net 3.5, .net 4, Silverlight 3, Silverlight 4 and Windows Phone 7. Even in client profile mode

Simple templates

public class Auditable : IAuditable
{
    public DateTime CreateDate { get; set; }
    public string CreatedBy { get; set; }
    public DateTime UpdateDate { get; set; }
    public string UpdateBy { get; set; }
}


public class ErrorInfo : IDataErrorInfo
{
    public object Target { get; set; }

    #region IDataErrorInfo Members

    public string this[string columName]
    {
        get { return Validator.Validate(Target, columName); }
    }

    public string Error
    {
        get { return Validator.Validate(Target); }
    }

    #endregion
}

Your code

[ExtendWith(typeof(ErrorInfo), typeof(Auditable))]
public class Person
{
    public string FirstName { get; set; }
    public string LastName { get; set; }
    public DateTime Birthdate { get; set; }
}

What gets compiled

public class Person : IAuditable, IDataErrorInfo
{
    private Auditable Auditable_1 = new Auditable();
    private ErrorInfo ErrorInfo_1 = new ErrorInfo();

    public Person()
    {
        this.ErrorInfo_1.Target = this;
    }

    public DateTime Birthdate { get; set; }
    public string FirstName { get; set; }
    public string LastName { get; set; }
	
    //Auditable members
	
    public DateTime CreateDate
    {
        get
        {
            return this.Auditable_1.CreateDate;
        }
        set
        {
            this.Auditable_1.CreateDate = value;
        }
    }

    public string CreatedBy
    {
        get
        {
            return this.Auditable_1.CreatedBy;
        }
        set
        {
            this.Auditable_1.CreatedBy = value;
        }
    }
	
    public string UpdateBy
    {

        get
        {
            return this.Auditable_1.UpdateBy;
        }

        set
        {
            this.Auditable_1.UpdateBy = value;
        }
    }

    public DateTime UpdateDate
    {
        get
        {
            return this.Auditable_1.UpdateDate;
        }
        set
        {
            this.Auditable_1.UpdateDate = value;
        }
    }

    //dataerror info members
	
    public string Error
    {
        get
        {
            return this.ErrorInfo_1.Error;
        }
    }

    public string this[string columName]
    {
        get
        {
            return this.ErrorInfo_1[columName];
        }
    }
}

Tools and products used