C# - Get Property's Display Name From A Custom Attribute?

I am trying to create a minimum length validation attribute which will force users to enter the specified minimum amount of characters into a textbox

public sealed class MinimumLengthAttribute : ValidationAttribute
{
public int MinLength { get; set; }
public MinimumLengthAttribute(int minLength)
{
MinLength = minLength;
}
public override bool IsValid(object value)
{
if (value == null)
{
return true;
}
string valueAsString = value as string;
return (valueAsString != null && valueAsString.Length >= MinLength);
}
}

In the constructor of the MinimumLengthAttribute I would like to set the error message as follows:

ErrorMessage = "{0} must be atleast {1} characters long"

How can I get the property's display name so that I can populate the {0} placeholder?