Update GDB tables

Search GDB table : Example 1

IMxDocument pMxDocument = ArcMap.Application.Document as IMxDocument;
IMap pMap = pMxDocument.FocusMap;
ILayer pLayer = pMap.get_Layer(0);
IFeatureLayer pFeatureLayer = (IFeatureLayer)pLayer;
IFeatureClass pFeatureClass = pFeatureLayer.FeatureClass;
IFields pFields = (IFields)pFeatureClass;
ITable pTable = (ITable)pFeatureClass;
ICursor pCursor = pTable.Search(null, false);
IRow pRow = pCursor.NextRow();
while (pRow != null)
{
    string.IsNullOrEmpty(output);
    for (int i = 0; i <= pFields.FieldCount - 1; i++) {
        output += pFields.Field(i).Name + ": " + pRow.Value(i).ToString + Constants.vbNewLine;
    }
    MessageBox.Show(pRow.get_Value(fldIndex).ToString());
    pRow = pCursor.NextRow();

}

Search GDB table : Example 2

IMxDocument pMxDocument = ArcMap.Application.Document as IMxDocument;
IMap pMap = pMxDocument.FocusMap;
ILayer pLayer = pMap.get_Layer(0);
IFeatureLayer pFeatureLayer = (IFeatureLayer)pLayer;
IFeatureClass pFeatureClass = pFeatureLayer.FeatureClass;
IFields pFields = (IFields)pFeatureClass;
ITable pTable = (ITable)pFeatureClass;
ICursor pCursor = pTable.Search(null, false);
string[] FieldNames = {"Name", "Address", "City"};
string output = null;
IRow pRow = pCursor.NextRow();
while (pRow != null)
{
    string.IsNullOrEmpty(output);
    foreach (string fieldName in FieldNames) {
        output += fieldName + ": " + pRow.Value(pFields.FindField(fieldName)).ToString + Constants.vbNewLine;
    }
    MessageBox.Show(output);
    pRow = pCursor.NextRow();

}