Keep Coding

Problem 1:
I am new to MICROSOFT DYNAMIC CRM 365. I have few tables with my CRM like(Account,Customer).I want to fetch all data from table account.
Below is my sample code for connection:(not sure this is correct or not but getting output message that i am connected to CRM)
public void ConnectToMSCRM(string UserName, string Password, string SoapOrgServiceUri)
{
try
{
ClientCredentials credentials = new ClientCredentials();
credentials.UserName.UserName = UserName;
credentials.UserName.Password = Password;
Uri serviceUri = new Uri(SoapOrgServiceUri);
OrganizationServiceProxy proxy = new OrganizationServiceProxy(serviceUri, null, credentials, null);
proxy.EnableProxyTypes();
_services = (IOrganizationService)proxy;
Response.Write("Connected to CRM \n");
}
I need all data to be retrieved on button click event .
Output should be: result of "select * from ABC";
Problem 2:
if possible please suggest how to fetch records using given column name.
Output should be: result of "select * from ABC where ColumnName="test";

What about Query Expression
This is your query :
"Select * from ABC where ColumnName="test";
And this is QueryExpression
QueryExpression query = new QueryExpression()
{
EntityName = ABC.EntityLogicalName,
ColumnSet = new ColumnSet("test"),
};
to excute the quey this is how :
DataCollection<Entity> entityCollection = _services.RetrieveMultiple(query).Entities;
// Display the results.
foreach (Contact contact in entityCollection)
{
Console.WriteLine("my test: {0}", contact.test);
}
Regards