Variable in my model
[Display(Name = "Enlem")]
public double Latitute { get; set; }
part of my view
<div class="editor-label">
@Html.LabelFor(m => m.Latitute)
</div>
<div class="editor-field">
@Html.TextBoxFor(m => m.Latitute)<br />
@Html.ValidationMessageFor(m => m.Latitute)
</div>
And error:

with comma, Error:

How Can I fix it? I cant find what is the problem.
Thanks.
This seems to be the problem with client side validation and localization in jQuery.
Short solution
Longer solution requires integration with jQuery Globalize
This article describes how to alter jQuery number validators to perform the validation your way.
All those things apply to the comma problem, I don’t really understand the second problem with the dot, so I can’t help here. Try debugging what is going on under the hood and provide some more information on what is failing – client/server side and what is really happening.