颜色怎样统一转换为ＡＲＧＢ

// System.Windows.Media.Color
public override string ToString()
{
	string format = this.isFromScRgb ? "R" : null;
	return this.ConvertToString(format, null);
}
// System.Windows.Media.Color
public string ToString(IFormatProvider provider)
{
	string format = this.isFromScRgb ? "R" : null;
	return this.ConvertToString(format, provider);
}
// System.Windows.Media.Color
internal string ConvertToString(string format, IFormatProvider provider)
{
	StringBuilder stringBuilder = new StringBuilder();
	if (this.context == null)
	{
		if (format == null)
		{
			stringBuilder.AppendFormat(provider, "#{0:X2}", new object[]
			{
				this.sRgbColor.a
			});
			stringBuilder.AppendFormat(provider, "{0:X2}", new object[]
			{
				this.sRgbColor.r
			});
			stringBuilder.AppendFormat(provider, "{0:X2}", new object[]
			{
				this.sRgbColor.g
			});
			stringBuilder.AppendFormat(provider, "{0:X2}", new object[]
			{
				this.sRgbColor.b
			});
		}
		else
		{
			char numericListSeparator = TokenizerHelper.GetNumericListSeparator(provider);
			stringBuilder.AppendFormat(provider, string.Concat(new string[]
			{
				"sc#{1:",
				format,
				"}{0} {2:",
				format,
				"}{0} {3:",
				format,
				"}{0} {4:",
				format,
				"}"
			}), new object[]
			{
				numericListSeparator,
				this.scRgbColor.a,
				this.scRgbColor.r,
				this.scRgbColor.g,
				this.scRgbColor.b
			});
		}
	}
	else
	{
		char numericListSeparator2 = TokenizerHelper.GetNumericListSeparator(provider);
		format = "R";
		string components = new Uri(this.context.ProfileUri.GetComponents(UriComponents.SerializationInfoString, UriFormat.SafeUnescaped), this.context.ProfileUri.IsAbsoluteUri ? UriKind.Absolute : UriKind.Relative).GetComponents(UriComponents.SerializationInfoString, UriFormat.UriEscaped);
		stringBuilder.AppendFormat(provider, "{0}{1} ", new object[]
		{
			"ContextColor ",
			components
		});
		stringBuilder.AppendFormat(provider, "{1:" + format + "}{0}", new object[]
		{
			numericListSeparator2,
			this.scRgbColor.a
		});
		for (int i = 0; i < this.nativeColorValue.GetLength(0); i++)
		{
			stringBuilder.AppendFormat(provider, "{0:" + format + "}", new object[]
			{
				this.nativeColorValue[i]
			});
			if (i < this.nativeColorValue.GetLength(0) - 1)
			{
				stringBuilder.AppendFormat(provider, "{0}", new object[]
				{
					numericListSeparator2
				});
			}
		}
	}
	return stringBuilder.ToString();
}