private void SimpleMarkerMenuItem_Click(object sender, EventArgs e)
{
string jsonString = @"{
""type"": ""esriSMS"",
""style"": ""esriSMSSquare"",
""color"": [76,115,0,255],
""size"": 8,
""angle"": 0,
""xoffset"": 0,
""yoffset"": 0,
""outline"":
{
""color"": [152,230,0,255],
""width"": 1
}
}
";
UseSymbol(jsonString);
}