java.util.regex.Matcher.replaceFirst C# (CSharp) Method

        public global::java.lang.String replaceFirst(java.lang.String arg0)
        {
            return global::MonoJavaBridge.JavaBridge.CallSealedClassObjectMethod<java.lang.String>(this, global::java.util.regex.Matcher.staticClass, "replaceFirst", "(Ljava/lang/String;)Ljava/lang/String;", ref global::java.util.regex.Matcher._m4, global::MonoJavaBridge.JavaBridge.ConvertToValue(arg0)) as java.lang.String;
        }

		private string ReplaceGroupNumber (Matcher match,
			string reformattedPattern,
			PatternGrouping patternGrouping,
			RegexOptions options) {
			int groupNumber = int.Parse (match.group (1));
			int javaGroupNumber = groupNumber;
			int groupCount = patternGrouping.GroupCount;

			if (groupCount == -1) {
				if ((options & RegexOptions.ExplicitCapture) == RegexOptions.ExplicitCapture) {
					groupCount = 0;
				}
				else {
					groupCount = JavaUtils.GroupCount (reformattedPattern);
				}
			}
			else {
				javaGroupNumber = patternGrouping.NetToJavaNumbersMap [groupNumber];
			}

			if (groupNumber > groupCount) {
				return null;
			}

			return match.replaceFirst (@"\\" + javaGroupNumber);
		}