System.Data.DataColumn.SetValue C# (CSharp) Method

        internal void SetValue(int record, object value)
        {
            // just silently set the value
            try
            {
                Debug.Assert(null != value, "setting null, expecting dbnull");
                Debug.Assert(null != _table, "storage with no DataTable on column");
                Debug.Assert(null != _storage, "no storage");
                _storage.Set(record, value);
            }
            catch (Exception e)
            {
                ExceptionBuilder.TraceExceptionForCapture(e);
                throw ExceptionBuilder.SetFailed(value, this, DataType, e);
            }

            DataRow dr = GetDataRow(record);
            if (dr != null)
            {  // at initialization time (datatable.NewRow(), we would fill the storage with default value, but at that time we wont have datarow)
                dr.LastChangedColumn = this;
            }
        }

        internal void SilentlySetValue(DataRow dr, DataColumn dc, DataRowVersion version, object newValue) {
            // get record for version
            int record = dr.GetRecordFromVersion(version);

            bool equalValues = false;
            if (DataStorage.IsTypeCustomType(dc.DataType) && newValue != dc[record]) {
                // if UDT storage, need to check if reference changed. See bug 385182
                equalValues = false;
            }
            else {
                equalValues = dc.CompareValueTo(record, newValue, true);
            }

            // if expression has changed
            if (!equalValues) {
                int[] oldIndex = dr.Table.RemoveRecordFromIndexes(dr, version);// conditional, if it exists it will try to remove with no event fired
                dc.SetValue(record, newValue);
                int[] newIndex = dr.Table.InsertRecordToIndexes(dr, version);// conditional, it will insert if it qualifies, no event will be fired
                if (dr.HasVersion(version)) {
                    if (version != DataRowVersion.Original) {
                        dr.Table.RecordChanged(oldIndex, newIndex);
                    }
                    if (dc.dependentColumns != null) {
                        //BugBug - passing in null for cachedRows.  This means expression columns as keys does not work when key changes.
                        dc.Table.EvaluateDependentExpressions(dc.dependentColumns, dr, version, null);
                    }
                }
             }
             dr.ResetLastChangedColumn();
        }