public virtual char ToUpper(char c)
{
if (TextInfo.IsAscii(c) && this.IsAsciiCasingSameAsInvariant)
{
return(TextInfo.ToUpperAsciiInvariant(c));
}
return(TextInfo.InternalChangeCaseChar(this.m_dataHandle, this.m_handleOrigin, this.m_textInfoName, c, true));
}