A better `ExpressionHelper.GetExpressionText` that handles Convert Expression.

GetExpressionText.cs

/// <summary>
/// Return the expression text
/// </summary>
/// <typeparam name="TModel"></typeparam>
/// <param name="expression"></param>
/// <returns></returns>
public static string GetExpressionText<TModel>(Expression<Func<TModel, object>> expression)
{
    var expr = (LambdaExpression)expression;
    if (expr.Body.NodeType == ExpressionType.Convert)
    {
        var ue = expr.Body as UnaryExpression;
        var me = ((ue != null) ? ue.Operand : null) as MemberExpression;
        return me.Member.Name;
    }
    return ExpressionHelper.GetExpressionText(expr);
} 

Nice one, thanks :)
IMHO it makes the function a little more flexible if you change it to:

public static string GetExpressionText<TModel, TProperty>(Expression<Func<TModel, TProperty>> expression)