Microsoft.Scripting.Debugging.DebugFrame.GetFunctionInfo C# (CSharp) Method

        private FunctionInfo GetFunctionInfo(int version) {
            if (version == _funcInfo.Version)
                return _funcInfo;

            FunctionInfo funcInfo = _funcInfo;
            FunctionInfo lastFuncInfo = null;
            while (funcInfo != null) {
                if (funcInfo.Version == version) {
                    return funcInfo;
                }

                lastFuncInfo = funcInfo;

                if (version > funcInfo.Version) {
                    funcInfo = funcInfo.NextVersion;
                } else {
                    funcInfo = funcInfo.PreviousVersion;
                }
            }

            // if version is Int32.MaxValue return the latest factory
            if (version == Int32.MaxValue)
                return lastFuncInfo;

            return null;
        }