C# Linq Expressions that cache's the get properties

linq-expression-get-properties.cs

private static Dictionary<Type, Dictionary<string, object>> _propertyAccess = new Dictionary<Type, Dictionary<string, object>>();

private static void CacheProperties<T>()
{
    if (_propertyAccess.ContainsKey(typeof(T)))
        return;

    _propertyAccess.Add(typeof(T), new Dictionary<string, object>(StringComparer.OrdinalIgnoreCase));

    foreach (var prop in typeof(T).GetProperties())
    {
        var xtype = System.Linq.Expressions.Expression.Parameter(typeof(T));
        var xprop = System.Linq.Expressions.Expression.Property(xtype, prop.Name);
        var xconv = System.Linq.Expressions.Expression.Convert(xprop, typeof(object));
        var exp = System.Linq.Expressions.Expression.Lambda(xconv, xtype);
        var func = exp.Compile();
        _propertyAccess[typeof(T)][prop.Name] = func;
    }
}