Validation Across Class Hierarchies and Interface Implementations

namespace SampleTest {
    partial class frmTest {
        /// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ComponentModel.IContainer components = null;

        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
        protected override void Dispose(bool disposing) {
            if (disposing && (components != null)) {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region Windows Form Designer generated code

        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent() {
            this.btnTest = new System.Windows.Forms.Button();
            this.lblFirstName = new System.Windows.Forms.Label();
            this.lblDateOfBirth = new System.Windows.Forms.Label();
            this.lblLastName = new System.Windows.Forms.Label();
            this.txtFirstName = new System.Windows.Forms.TextBox();
            this.txtLastName = new System.Windows.Forms.TextBox();
            this.txtDateOfBirth = new System.Windows.Forms.TextBox();
            this.SuspendLayout();
            // 
            // btnTest
            // 
            this.btnTest.Location = new System.Drawing.Point(111, 231);
            this.btnTest.Name = "btnTest";
            this.btnTest.Size = new System.Drawing.Size(75, 23);
            this.btnTest.TabIndex = 0;
            this.btnTest.Text = "Test";
            this.btnTest.UseVisualStyleBackColor = true;
            this.btnTest.Click += new System.EventHandler(this.btnTest_Click);
            // 
            // lblFirstName
            // 
            this.lblFirstName.AutoSize = true;
            this.lblFirstName.Location = new System.Drawing.Point(28, 36);
            this.lblFirstName.Name = "lblFirstName";
            this.lblFirstName.Size = new System.Drawing.Size(57, 13);
            this.lblFirstName.TabIndex = 1;
            this.lblFirstName.Text = "First Name";
            // 
            // lblDateOfBirth
            // 
            this.lblDateOfBirth.AutoSize = true;
            this.lblDateOfBirth.Location = new System.Drawing.Point(28, 99);
            this.lblDateOfBirth.Name = "lblDateOfBirth";
            this.lblDateOfBirth.Size = new System.Drawing.Size(68, 13);
            this.lblDateOfBirth.TabIndex = 2;
            this.lblDateOfBirth.Text = "Date Of Birth";
            // 
            // lblLastName
            // 
            this.lblLastName.AutoSize = true;
            this.lblLastName.Location = new System.Drawing.Point(28, 65);
            this.lblLastName.Name = "lblLastName";
            this.lblLastName.Size = new System.Drawing.Size(58, 13);
            this.lblLastName.TabIndex = 3;
            this.lblLastName.Text = "Last Name";
            // 
            // txtFirstName
            // 
            this.txtFirstName.Location = new System.Drawing.Point(99, 36);
            this.txtFirstName.Name = "txtFirstName";
            this.txtFirstName.Size = new System.Drawing.Size(100, 20);
            this.txtFirstName.TabIndex = 4;
            // 
            // txtLastName
            // 
            this.txtLastName.Location = new System.Drawing.Point(99, 65);
            this.txtLastName.Name = "txtLastName";
            this.txtLastName.Size = new System.Drawing.Size(100, 20);
            this.txtLastName.TabIndex = 5;
            // 
            // txtDateOfBirth
            // 
            this.txtDateOfBirth.Location = new System.Drawing.Point(99, 96);
            this.txtDateOfBirth.Name = "txtDateOfBirth";
            this.txtDateOfBirth.Size = new System.Drawing.Size(100, 20);
            this.txtDateOfBirth.TabIndex = 6;
            // 
            // frmTest
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(292, 266);
            this.Controls.Add(this.txtDateOfBirth);
            this.Controls.Add(this.txtLastName);
            this.Controls.Add(this.txtFirstName);
            this.Controls.Add(this.lblLastName);
            this.Controls.Add(this.lblDateOfBirth);
            this.Controls.Add(this.lblFirstName);
            this.Controls.Add(this.btnTest);
            this.Name = "frmTest";
            this.Text = "frmTest";
            this.ResumeLayout(false);
            this.PerformLayout();

        }

        #endregion

        private System.Windows.Forms.Button btnTest;
        private System.Windows.Forms.Label lblFirstName;
        private System.Windows.Forms.Label lblDateOfBirth;
        private System.Windows.Forms.Label lblLastName;
        private System.Windows.Forms.TextBox txtFirstName;
        private System.Windows.Forms.TextBox txtLastName;
        private System.Windows.Forms.TextBox txtDateOfBirth;
    }
}