public String buildExtensionField(String extensionKey, String field) {StringBuilder builder = new StringBuilder(field);builder.append(this.extensionFieldDelimiter);builder.append(extensionKey);return escapeExtensionField(builder.toString());}

public String buildExtensionField ( String extensionKey , String field ) { StringBuilder builder = new StringBuilder ( field ) ; builder . append ( this . extensionFieldDelimiter ) ; builder . append ( extensionKey ) ; return escapeExtensionField ( builder . toString ( ) ) ; }
public virtual string BuildExtensionField(string extensionKey, string field){StringBuilder builder = new StringBuilder(field);builder.Append(this.extensionFieldDelimiter);builder.Append(extensionKey);return EscapeExtensionField(builder.ToString());}
