Convert string column name into property accessor

String2Lambda.cs

public Expression<Func<TEntity, TProperty>> ColumnByName<TEntity, TProperty>(string columnName)
{
    var propInfo = typeof(TEntity).GetProperty(columnName);
    var parameter = Expression.Parameter(typeof(TEntity));
    var memberAccess = Expression.MakeMemberAccess(parameter, propInfo);

    var exp = Expression.Lambda<Func<TEntity, TProperty>>(memberAccess, parameter);

    return exp;
}