The error occurs in line 471 in LabelLaer.cs
text = feature[LabelColumn].ToString();
So the question is - How to change the encoding of layer columns names?
LabelColumn = "кв" , but in feature field name = "ËÑ" , .
Emphasize the problem is with label field name of the label layer , text of labels with cyrillic is displayed correctly.
I do not understand by now, how from the "кв", appears string "ËÑ" in the feature field name.
Layers with the columns names , that contains Cyrillic, are displayed normally. The problem is associated with the label field name of the label layers , when it contains cyrillic.