ForeignKeyAttribute.cs

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namespace System.ComponentModel.DataAnnotations.Schema;
 
[AttributeUsage(AttributeTargets.Property | AttributeTargets.Field, AllowMultiple = false)]
public class ForeignKeyAttribute : Attribute
{
    public string Name { get; }
 
    public ForeignKeyAttribute(string name)
    {
        if (string.IsNullOrWhiteSpace(name))
        {
            throw new ArgumentException(System.SR.Format(System.SR.ArgumentIsNullOrWhitespace, "name"), "name");
        }
        Name = name;
    }
}