public virtual int Read([In, Out] char[] buffer, int index, int count)
{
    if (buffer == null)
    {
        throw new ArgumentNullException("buffer", Environment.GetResourceString("ArgumentNull_Buffer"));
    }
    if (index < 0)
    {
        throw new ArgumentOutOfRangeException("index", Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegNum"));
    }
    if (count < 0)
    {
        throw new ArgumentOutOfRangeException("count", Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegNum"));
    }
    if ((buffer.Length - index) < count)
    {
        throw new ArgumentException(Environment.GetResourceString("Argument_InvalidOffLen"));
    }
    int num = 0;
    do
    {
        int num2 = this.Read();
        if (num2 == -1)
        {
            return num;
        }
        buffer[index + num++] = (char) num2;
    }
    while (num < count);
    return num;
}

public virtual int ReadBlock([In, Out] char[] buffer, int index, int count)
{
    int num;
    int num2 = 0;
    do
    {
        num2 += num = this.Read(buffer, index + num2, count - num2);
    }
    while ((num > 0) && (num2 < count));
    return num2;
}